diff --git a/src/lagrangian/basic/Cloud/Cloud.C b/src/lagrangian/basic/Cloud/Cloud.C
index c140c449d5..425c8221cd 100644
--- a/src/lagrangian/basic/Cloud/Cloud.C
+++ b/src/lagrangian/basic/Cloud/Cloud.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2004-2010 OpenCFD Ltd.
+    \\  /    A nd           | Copyright (C) 2004-2011 OpenCFD Ltd.
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -32,12 +32,6 @@ License
 #include "OFstream.H"
 #include "wallPolyPatch.H"
 
-// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
-
-template<class ParticleType>
-const Foam::scalar Foam::Cloud<ParticleType>::trackingCorrectionTol = 1e-5;
-
-
 // * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * * //
 
 template<class ParticleType>
@@ -47,7 +41,7 @@ void Foam::Cloud<ParticleType>::calcCellWallFaces() const
 
     PackedBoolList& cellWallFaces = cellWallFacesPtr_();
 
-    const polyBoundaryMesh& patches = pMesh().boundaryMesh();
+    const polyBoundaryMesh& patches = polyMesh_.boundaryMesh();
 
     forAll(patches, patchI)
     {
@@ -78,9 +72,7 @@ Foam::Cloud<ParticleType>::Cloud
     cloud(pMesh),
     IDLList<ParticleType>(),
     polyMesh_(pMesh),
-    particleCount_(0),
     labels_(),
-    cellTree_(),
     nTrackingRescues_(),
     cellWallFacesPtr_()
 {
@@ -104,9 +96,7 @@ Foam::Cloud<ParticleType>::Cloud
     cloud(pMesh, cloudName),
     IDLList<ParticleType>(),
     polyMesh_(pMesh),
-    particleCount_(0),
     labels_(),
-    cellTree_(),
     nTrackingRescues_(),
     cellWallFacesPtr_()
 {
@@ -121,236 +111,6 @@ Foam::Cloud<ParticleType>::Cloud
 
 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
-template<class ParticleType>
-void Foam::Cloud<ParticleType>::findCellFacePt
-(
-    const point& pt,
-    label& cellI,
-    label& tetFaceI,
-    label& tetPtI
-) const
-{
-    cellI = -1;
-    tetFaceI = -1;
-    tetPtI = -1;
-
-    const indexedOctree<treeDataCell>& tree = cellTree();
-
-    // Find nearest cell to the point
-
-    pointIndexHit info = tree.findNearest(pt, sqr(GREAT));
-
-    if (info.hit())
-    {
-        label nearestCellI = tree.shapes().cellLabels()[info.index()];
-
-        // Check the nearest cell to see if the point is inside.
-        findFacePt(nearestCellI, pt, tetFaceI, tetPtI);
-
-        if (tetFaceI != -1)
-        {
-            // Point was in the nearest cell
-
-            cellI = nearestCellI;
-
-            return;
-        }
-        else
-        {
-            // Check the other possible cells that the point may be in
-
-            labelList testCells = tree.findIndices(pt);
-
-            forAll(testCells, pCI)
-            {
-                label testCellI = tree.shapes().cellLabels()[testCells[pCI]];
-
-                if (testCellI == nearestCellI)
-                {
-                    // Don't retest the nearest cell
-
-                    continue;
-                }
-
-                // Check the test cell to see if the point is inside.
-                findFacePt(testCellI, pt, tetFaceI, tetPtI);
-
-                if (tetFaceI != -1)
-                {
-                    // Point was in the test cell
-
-                    cellI = testCellI;
-
-                    return;
-                }
-            }
-        }
-    }
-    else
-    {
-        FatalErrorIn
-        (
-            "void Foam::Cloud<ParticleType>::findCellFacePt"
-            "("
-                "const point& pt, "
-                "label& cellI, "
-                "label& tetFaceI, "
-                "label& tetPtI"
-            ") const"
-        )   << "Did not find nearest cell in search tree."
-            << abort(FatalError);
-    }
-}
-
-
-template<class ParticleType>
-void Foam::Cloud<ParticleType>::findFacePt
-(
-    label cellI,
-    const point& pt,
-    label& tetFaceI,
-    label& tetPtI
-) const
-{
-    tetFaceI = -1;
-    tetPtI = -1;
-
-    List<tetIndices> cellTets = polyMeshTetDecomposition::cellTetIndices
-    (
-        polyMesh_,
-        cellI
-    );
-
-    forAll(cellTets, tetI)
-    {
-        const tetIndices& cellTetIs = cellTets[tetI];
-
-        if (inTet(pt, cellTetIs.tet(polyMesh_)))
-        {
-            tetFaceI = cellTetIs.face();
-            tetPtI = cellTetIs.tetPt();
-
-            return;
-        }
-    }
-}
-
-
-template<class ParticleType>
-bool Foam::Cloud<ParticleType>::inTet
-(
-    const point& pt,
-    const tetPointRef& tet
-) const
-{
-    // For robustness, assuming that the point is in the tet unless
-    // "definitively" shown otherwise by obtaining a positive dot
-    // product greater than a tolerance of SMALL.
-
-    // The tet is defined: tet(Cc, tetBasePt, pA, pB) where the normal
-    // vectors and base points for the half-space planes are:
-    // area[0] = tet.Sa();
-    // area[1] = tet.Sb();
-    // area[2] = tet.Sc();
-    // area[3] = tet.Sd();
-    // planeBase[0] = tetBasePt = tet.b()
-    // planeBase[1] = ptA       = tet.c()
-    // planeBase[2] = tetBasePt = tet.b()
-    // planeBase[3] = tetBasePt = tet.b()
-
-    vector n = vector::zero;
-
-    {
-        // 0, a
-        const point& basePt = tet.b();
-
-        n = tet.Sa();
-        n /= (mag(n) + VSMALL);
-
-        if (((pt - basePt) & n) > SMALL)
-        {
-            return false;
-        }
-    }
-
-    {
-        // 1, b
-        const point& basePt = tet.c();
-
-        n = tet.Sb();
-        n /= (mag(n) + VSMALL);
-
-        if (((pt - basePt) & n) > SMALL)
-        {
-            return false;
-        }
-    }
-
-    {
-        // 2, c
-        const point& basePt = tet.b();
-
-        n = tet.Sc();
-        n /= (mag(n) + VSMALL);
-
-        if (((pt - basePt) & n) > SMALL)
-        {
-            return false;
-        }
-    }
-
-    {
-        // 3, d
-        const point& basePt = tet.b();
-
-        n = tet.Sd();
-        n /= (mag(n) + VSMALL);
-
-        if (((pt - basePt) & n) > SMALL)
-        {
-            return false;
-        }
-    }
-
-    return true;
-}
-
-
-template<class ParticleType>
-const Foam::indexedOctree<Foam::treeDataCell>&
-Foam::Cloud<ParticleType>::cellTree() const
-{
-    if (cellTree_.empty())
-    {
-        treeBoundBox overallBb(polyMesh_.points());
-
-        Random rndGen(261782);
-
-        overallBb = overallBb.extend(rndGen, 1E-4);
-        overallBb.min() -= point(ROOTVSMALL, ROOTVSMALL, ROOTVSMALL);
-        overallBb.max() += point(ROOTVSMALL, ROOTVSMALL, ROOTVSMALL);
-
-        cellTree_.reset
-        (
-            new indexedOctree<treeDataCell>
-            (
-                treeDataCell
-                (
-                    false,      // not cache bb
-                    polyMesh_
-                ),
-                overallBb,
-                8,              // maxLevel
-                10,             // leafsize
-                3.0             // duplicity
-            )
-        );
-    }
-
-    return cellTree_();
-}
-
-
 template<class ParticleType>
 const Foam::PackedBoolList& Foam::Cloud<ParticleType>::cellHasWallFaces()
 const
@@ -364,22 +124,6 @@ const
 }
 
 
-
-template<class ParticleType>
-Foam::label Foam::Cloud<ParticleType>::getNewParticleID() const
-{
-    label id = particleCount_++;
-
-    if (id == labelMax)
-    {
-        WarningIn("Cloud<ParticleType>::getNewParticleID() const")
-            << "Particle counter has overflowed. This might cause problems"
-            << " when reconstructing particle tracks." << endl;
-    }
-    return id;
-}
-
-
 template<class ParticleType>
 void Foam::Cloud<ParticleType>::addParticle(ParticleType* pPtr)
 {
@@ -399,14 +143,14 @@ void Foam::Cloud<ParticleType>::cloudReset(const Cloud<ParticleType>& c)
 {
     // Reset particle cound and particles only
     // - not changing the cloud object registry or reference to the polyMesh
-    particleCount_ = 0;
+    ParticleType::particleCount_ = 0;
     IDLList<ParticleType>::operator=(c);
 }
 
 
 template<class ParticleType>
-template<class TrackingData>
-void Foam::Cloud<ParticleType>::move(TrackingData& td, const scalar trackTime)
+template<class TrackData>
+void Foam::Cloud<ParticleType>::move(TrackData& td, const scalar trackTime)
 {
     const polyBoundaryMesh& pbm = pMesh().boundaryMesh();
     const globalMeshData& pData = polyMesh_.globalData();
@@ -472,9 +216,9 @@ void Foam::Cloud<ParticleType>::move(TrackingData& td, const scalar trackTime)
             {
                 // If we are running in parallel and the particle is on a
                 // boundary face
-                if (Pstream::parRun() && p.faceI_ >= pMesh().nInternalFaces())
+                if (Pstream::parRun() && p.face() >= pMesh().nInternalFaces())
                 {
-                    label patchI = pbm.whichPatch(p.faceI_);
+                    label patchI = pbm.whichPatch(p.face());
 
                     // ... and the face is on a processor patch
                     // prepare it for transfer
@@ -571,7 +315,7 @@ void Foam::Cloud<ParticleType>::move(TrackingData& td, const scalar trackTime)
                 IDLList<ParticleType> newParticles
                 (
                     particleStream,
-                    typename ParticleType::iNew(*this)
+                    typename ParticleType::iNew(polyMesh_)
                 );
 
                 label pI = 0;
@@ -600,57 +344,64 @@ void Foam::Cloud<ParticleType>::move(TrackingData& td, const scalar trackTime)
 
 
 template<class ParticleType>
-void Foam::Cloud<ParticleType>::autoMap(const mapPolyMesh& mapper)
+template<class TrackData>
+void Foam::Cloud<ParticleType>::autoMap
+(
+    TrackData& td,
+    const mapPolyMesh& mapper
+)
 {
     if (cloud::debug)
     {
-        Info<< "Cloud<ParticleType>::autoMap(const morphFieldMapper& map) "
-               "for lagrangian cloud " << cloud::name() << endl;
+        Info<< "Cloud<ParticleType>::autoMap(TrackData&, const mapPolyMesh&) "
+            << "for lagrangian cloud " << cloud::name() << endl;
     }
 
     const labelList& reverseCellMap = mapper.reverseCellMap();
     const labelList& reverseFaceMap = mapper.reverseFaceMap();
 
     // Reset stored data that relies on the mesh
-    cellTree_.clear();
+//    polyMesh_.clearCellTree();
     cellWallFacesPtr_.clear();
 
     forAllIter(typename Cloud<ParticleType>, *this, pIter)
     {
-        if (reverseCellMap[pIter().cellI_] >= 0)
-        {
-            pIter().cellI_ = reverseCellMap[pIter().cellI_];
+        ParticleType& p = pIter();
 
-            if (pIter().faceI_ >= 0 && reverseFaceMap[pIter().faceI_] >= 0)
+        if (reverseCellMap[p.cell()] >= 0)
+        {
+            p.cell() = reverseCellMap[p.cell()];
+
+            if (p.face() >= 0 && reverseFaceMap[p.face()] >= 0)
             {
-                pIter().faceI_ = reverseFaceMap[pIter().faceI_];
+                p.face() = reverseFaceMap[p.face()];
             }
             else
             {
-                pIter().faceI_ = -1;
+                p.face() = -1;
             }
 
-            pIter().initCellFacePt();
+            p.initCellFacePt();
         }
         else
         {
-            label trackStartCell = mapper.mergedCell(pIter().cellI_);
+            label trackStartCell = mapper.mergedCell(p.cell());
 
             if (trackStartCell < 0)
             {
                 trackStartCell = 0;
             }
 
-            vector p = pIter().position();
+            vector pos = p.position();
 
-            const_cast<vector&>(pIter().position()) =
+            const_cast<vector&>(p.position()) =
                 polyMesh_.cellCentres()[trackStartCell];
 
-            pIter().stepFraction() = 0;
+            p.stepFraction() = 0;
 
-            pIter().initCellFacePt();
+            p.initCellFacePt();
 
-            pIter().track(p);
+            p.track(pos, td);
         }
     }
 }
diff --git a/src/lagrangian/basic/Cloud/Cloud.H b/src/lagrangian/basic/Cloud/Cloud.H
index 3715bcb75c..488fc63f3d 100644
--- a/src/lagrangian/basic/Cloud/Cloud.H
+++ b/src/lagrangian/basic/Cloud/Cloud.H
@@ -25,6 +25,7 @@ Class
     Foam::Cloud
 
 Description
+    Base cloud calls templated on particle type
 
 SourceFiles
     Cloud.C
@@ -80,15 +81,9 @@ class Cloud
 
         const polyMesh& polyMesh_;
 
-        //- Overall count of particles ever created. Never decreases.
-        mutable label particleCount_;
-
         //- Temporary storage for addressing. Used in findTris.
         mutable DynamicList<label> labels_;
 
-        //- Search tree to allow spatial tet searching
-        mutable autoPtr<indexedOctree<treeDataCell> > cellTree_;
-
         //- Count of how many tracking rescue corrections have been
         //  applied
         mutable label nTrackingRescues_;
@@ -114,8 +109,7 @@ class Cloud
 
 public:
 
-    template<class ParticleT>
-    friend class Particle;
+    friend class particle;
     template<class ParticleT>
     friend class IOPosition;
 
@@ -133,10 +127,6 @@ public:
         //- Name of cloud properties dictionary
         static word cloudPropertiesName;
 
-        //- Fraction of distance to tet centre to move a particle to
-        // 'rescue' it from a tracking problem
-        static const scalar trackingCorrectionTol;
-
 
     // Constructors
 
@@ -184,65 +174,15 @@ public:
                 return polyMesh_;
             }
 
-            //- Is this global face an internal face?
-            bool internalFace(const label faceI) const
-            {
-                return polyMesh_.isInternalFace(faceI);
-            }
-
-            //- Is this global face a boundary face?
-            bool boundaryFace(const label faceI) const
-            {
-                return !internalFace(faceI);
-            }
-
-            //- Which patch is this global face on
-            label facePatch(const label faceI) const
-            {
-                return polyMesh_.boundaryMesh().whichPatch(faceI);
-            }
-
-            //- Which face of this patch is this global face
-            label patchFace(const label patchI, const label faceI) const
-            {
-                return polyMesh_.boundaryMesh()[patchI].whichFace(faceI);
-            }
-
             label size() const
             {
                 return IDLList<ParticleType>::size();
             };
 
-            //- Find the cell, tetFaceI and tetPtI for the given
-            //  position
-            void findCellFacePt
-            (
-                const point& pt,
-                label& cellI,
-                label& tetFaceI,
-                label& tetPtI
-            ) const;
-
-            //- Find the tetFaceI and tetPtI for the given position in
-            //  the supplied cell, tetFaceI and tetPtI = -1 if not
-            //  found
-            void findFacePt
-            (
-                label cellI,
-                const point& pt,
-                label& tetFaceI,
-                label& tetPtI
-            ) const;
-
-            //- Test if the given position is inside the give tet
-            bool inTet
-            (
-                const point& pt,
-                const tetPointRef& tet
-            ) const;
-
-            //- Build (if necessary) and return the cell search tree
-            const indexedOctree<treeDataCell>& cellTree() const;
+            DynamicList<label>& labels()
+            {
+                return labels_;
+            }
 
             //- Return nTrackingRescues
             label nTrackingRescues() const
@@ -314,9 +254,6 @@ public:
                 return IDLList<ParticleType>::clear();
             };
 
-            //- Get unique particle creation id
-            label getNewParticleID() const;
-
             //- Transfer particle to cloud
             void addParticle(ParticleType* pPtr);
 
@@ -328,12 +265,13 @@ public:
 
             //- Move the particles
             //  passing the TrackingData to the track function
-            template<class TrackingData>
-            void move(TrackingData& td, const scalar trackTime);
+            template<class TrackData>
+            void move(TrackData& td, const scalar trackTime);
 
             //- Remap the cells of particles corresponding to the
             //  mesh topology change
-            virtual void autoMap(const mapPolyMesh&);
+            template<class TrackData>
+            void autoMap(TrackData& td, const mapPolyMesh&);
 
 
         // Read
diff --git a/src/lagrangian/basic/Cloud/CloudIO.C b/src/lagrangian/basic/Cloud/CloudIO.C
index 33d7913a77..0b978a2cc9 100644
--- a/src/lagrangian/basic/Cloud/CloudIO.C
+++ b/src/lagrangian/basic/Cloud/CloudIO.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2004-2010 OpenCFD Ltd.
+    \\  /    A nd           | Copyright (C) 2004-2011 OpenCFD Ltd.
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -24,7 +24,6 @@ License
 \*---------------------------------------------------------------------------*/
 
 #include "Cloud.H"
-#include "Particle.H"
 #include "Time.H"
 #include "IOPosition.H"
 
@@ -58,12 +57,12 @@ void Foam::Cloud<ParticleType>::readCloudUniformProperties()
         if (uniformPropsDict.found(procName))
         {
             uniformPropsDict.subDict(procName).lookup("particleCount")
-                >> particleCount_;
+                >> ParticleType::particleCount_;
         }
     }
     else
     {
-        particleCount_ = 0;
+        ParticleType::particleCount_ = 0;
     }
 }
 
@@ -86,7 +85,7 @@ void Foam::Cloud<ParticleType>::writeCloudUniformProperties() const
     );
 
     labelList np(Pstream::nProcs(), 0);
-    np[Pstream::myProcNo()] = particleCount_;
+    np[Pstream::myProcNo()] = ParticleType::particleCount_;
 
     Pstream::listCombineGather(np, maxEqOp<label>());
     Pstream::listCombineScatter(np);
@@ -107,7 +106,7 @@ void Foam::Cloud<ParticleType>::initCloud(const bool checkClass)
 {
     readCloudUniformProperties();
 
-    IOPosition<ParticleType> ioP(*this);
+    IOPosition<Cloud<ParticleType> > ioP(*this);
 
     if (ioP.headerOk())
     {
@@ -154,9 +153,7 @@ Foam::Cloud<ParticleType>::Cloud
 :
     cloud(pMesh),
     polyMesh_(pMesh),
-    particleCount_(0),
     labels_(),
-    cellTree_(),
     nTrackingRescues_(),
     cellWallFacesPtr_()
 {
@@ -174,9 +171,7 @@ Foam::Cloud<ParticleType>::Cloud
 :
     cloud(pMesh, cloudName),
     polyMesh_(pMesh),
-    particleCount_(0),
     labels_(),
-    cellTree_(),
     nTrackingRescues_(),
     cellWallFacesPtr_()
 {
@@ -262,8 +257,7 @@ void Foam::Cloud<ParticleType>::writeFields() const
 {
     if (this->size())
     {
-        const ParticleType& p = *this->first();
-        ParticleType::writeFields(p.cloud());
+        ParticleType::writeFields(*this);
     }
 }
 
diff --git a/src/lagrangian/basic/IOPosition/IOPosition.C b/src/lagrangian/basic/IOPosition/IOPosition.C
index e8d289d32e..13dd59285e 100644
--- a/src/lagrangian/basic/IOPosition/IOPosition.C
+++ b/src/lagrangian/basic/IOPosition/IOPosition.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2004-2010 OpenCFD Ltd.
+    \\  /    A nd           | Copyright (C) 2004-2011 OpenCFD Ltd.
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -27,11 +27,8 @@ License
 
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
-template<class ParticleType>
-Foam::IOPosition<ParticleType>::IOPosition
-(
-    const Cloud<ParticleType>& c
-)
+template<class CloudType>
+Foam::IOPosition<CloudType>::IOPosition(const CloudType& c)
 :
     regIOobject
     (
@@ -50,8 +47,8 @@ Foam::IOPosition<ParticleType>::IOPosition
 
 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
-template<class ParticleType>
-bool Foam::IOPosition<ParticleType>::write() const
+template<class CloudType>
+bool Foam::IOPosition<CloudType>::write() const
 {
     if (cloud_.size())
     {
@@ -64,19 +61,18 @@ bool Foam::IOPosition<ParticleType>::write() const
 }
 
 
-template<class ParticleType>
-bool Foam::IOPosition<ParticleType>::writeData(Ostream& os) const
+template<class CloudType>
+bool Foam::IOPosition<CloudType>::writeData(Ostream& os) const
 {
     os  << cloud_.size() << nl << token::BEGIN_LIST << nl;
 
-    forAllConstIter(typename Cloud<ParticleType>, cloud_, iter)
+    forAllConstIter(typename CloudType, cloud_, iter)
     {
+        const typename CloudType::particleType& p = iter();
+
         // Prevent writing additional fields
-        static_cast<const Particle<ParticleType>&>(iter()).write
-        (
-            os,
-            false
-        );
+        p.write(os, false);
+
         os  << nl;
     }
 
@@ -86,13 +82,11 @@ bool Foam::IOPosition<ParticleType>::writeData(Ostream& os) const
 }
 
 
-template<class ParticleType>
-void Foam::IOPosition<ParticleType>::readData
-(
-    Cloud<ParticleType>& c,
-    bool checkClass
-)
+template<class CloudType>
+void Foam::IOPosition<CloudType>::readData(CloudType& c, bool checkClass)
 {
+    const polyMesh& mesh = c.pMesh();
+
     Istream& is = readStream(checkClass ? typeName : "");
 
     token firstToken(is);
@@ -102,16 +96,16 @@ void Foam::IOPosition<ParticleType>::readData
         label s = firstToken.labelToken();
 
         // Read beginning of contents
-        is.readBeginList("Cloud<ParticleType>");
+        is.readBeginList("IOPosition<CloudType>::readData(CloudType, bool)");
 
         for (label i=0; i<s; i++)
         {
             // Do not read any fields, position only
-            c.append(new ParticleType(c, is, false));
+            c.append(new typename CloudType::particleType(mesh, is, false));
         }
 
         // Read end of contents
-        is.readEndList("Cloud<ParticleType>");
+        is.readEndList("IOPosition<CloudType>::readData(CloudType, bool)");
     }
     else if (firstToken.isPunctuation())
     {
@@ -119,12 +113,10 @@ void Foam::IOPosition<ParticleType>::readData
         {
             FatalIOErrorIn
             (
-                "void IOPosition<ParticleType>::readData"
-                "(Cloud<ParticleType>&, bool)",
+                "void IOPosition<CloudType>::readData(CloudType&, bool)",
                 is
             )   << "incorrect first token, '(', found "
-                << firstToken.info()
-                << exit(FatalIOError);
+                << firstToken.info() << exit(FatalIOError);
         }
 
         token lastToken(is);
@@ -138,26 +130,24 @@ void Foam::IOPosition<ParticleType>::readData
         {
             is.putBack(lastToken);
             // Do not read any fields, position only
-            c.append(new ParticleType(c, is, false));
-            is >> lastToken;
+            c.append(new typename CloudType::particleType(mesh, is, false));
+            is  >> lastToken;
         }
     }
     else
     {
         FatalIOErrorIn
         (
-            "void IOPosition<ParticleType>::readData"
-            "(Cloud<ParticleType>&, bool)",
+            "void IOPosition<ParticleType>::readData(CloudType&, bool)",
             is
         )   << "incorrect first token, expected <int> or '(', found "
-            << firstToken.info()
-            << exit(FatalIOError);
+            << firstToken.info() << exit(FatalIOError);
     }
 
     // Check state of IOstream
     is.check
     (
-        "void IOPosition<ParticleType>::readData(Cloud<ParticleType>&, bool)"
+        "void IOPosition<CloudType>::readData(CloudType&, bool)"
     );
 }
 
diff --git a/src/lagrangian/basic/IOPosition/IOPosition.H b/src/lagrangian/basic/IOPosition/IOPosition.H
index a81e4a0d3b..645b0219cf 100644
--- a/src/lagrangian/basic/IOPosition/IOPosition.H
+++ b/src/lagrangian/basic/IOPosition/IOPosition.H
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2004-2010 OpenCFD Ltd.
+    \\  /    A nd           | Copyright (C) 2004-2011 OpenCFD Ltd.
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -46,7 +46,7 @@ namespace Foam
                          Class IOPosition Declaration
 \*---------------------------------------------------------------------------*/
 
-template<class ParticleType>
+template<class CloudType>
 class IOPosition
 :
     public regIOobject
@@ -55,7 +55,7 @@ class IOPosition
     // Private data
 
         //- Reference to the cloud
-        const Cloud<ParticleType>& cloud_;
+        const CloudType& cloud_;
 
 
 public:
@@ -65,19 +65,20 @@ public:
         //- Runtime type name information. Use cloud type.
         virtual const word& type() const
         {
-            return cloud_.type();
+            return Cloud<typename CloudType::particleType>::typeName;
+            //cloud_.type();
         }
 
 
     // Constructors
 
         //- Construct from cloud
-        IOPosition(const Cloud<ParticleType>&);
+        IOPosition(const CloudType&);
 
 
     // Member functions
 
-        virtual void readData(Cloud<ParticleType>& c, bool checkClass);
+        virtual void readData(CloudType& c, bool checkClass);
 
         virtual bool write() const;
 
diff --git a/src/lagrangian/basic/InteractionLists/InteractionLists.C b/src/lagrangian/basic/InteractionLists/InteractionLists.C
index 862665e4ee..3a138449b5 100644
--- a/src/lagrangian/basic/InteractionLists/InteractionLists.C
+++ b/src/lagrangian/basic/InteractionLists/InteractionLists.C
@@ -29,6 +29,7 @@ License
 #include "treeDataFace.H"
 #include "treeDataCell.H"
 #include "volFields.H"
+#include "meshTools.H"
 
 // * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
@@ -1237,7 +1238,7 @@ void Foam::InteractionLists<ParticleType>::receiveReferredData
                 referredParticles_[constructMap[i]] = IDLList<ParticleType>
                 (
                     str,
-                    typename ParticleType::iNew(cloud_)
+                    typename ParticleType::iNew(mesh_)
                 );
             }
         }
diff --git a/src/lagrangian/basic/Make/files b/src/lagrangian/basic/Make/files
index cca45409c6..044d340f7a 100644
--- a/src/lagrangian/basic/Make/files
+++ b/src/lagrangian/basic/Make/files
@@ -1,8 +1,7 @@
-passiveParticle = passiveParticle
-indexedParticle = indexedParticle
-
-$(passiveParticle)/passiveParticleCloud.C
-$(indexedParticle)/indexedParticleCloud.C
+particle/particle.C
+particle/particleIO.C
+passiveParticle/passiveParticleCloud.C
+indexedParticle/indexedParticleCloud.C
 
 InteractionLists/referredWallFace/referredWallFace.C
 
diff --git a/src/lagrangian/basic/Make/options b/src/lagrangian/basic/Make/options
index 4b2f0a059f..f7d9a36f3b 100644
--- a/src/lagrangian/basic/Make/options
+++ b/src/lagrangian/basic/Make/options
@@ -1,5 +1,6 @@
 EXE_INC = \
-    -I$(LIB_SRC)/meshTools/lnInclude
+    -I$(LIB_SRC)/meshTools/lnInclude \
+    -I$(LIB_SRC)/finiteVolume/lnInclude
 
 LIB_LIBS = \
     -lmeshTools
diff --git a/src/lagrangian/basic/indexedParticle/indexedParticle.H b/src/lagrangian/basic/indexedParticle/indexedParticle.H
index 7d7dd52966..a13ff0d8a0 100644
--- a/src/lagrangian/basic/indexedParticle/indexedParticle.H
+++ b/src/lagrangian/basic/indexedParticle/indexedParticle.H
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2004-2010 OpenCFD Ltd.
+    \\  /    A nd           | Copyright (C) 2004-2011 OpenCFD Ltd.
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -25,18 +25,17 @@ Class
     Foam::indexedParticle
 
 Description
+    Adds label index to base particle
 
 SourceFiles
-    indexedParticleI.H
-    indexedParticle.C
-    indexedParticleIO.C
+    indexedParticle.H
 
 \*---------------------------------------------------------------------------*/
 
 #ifndef indexedParticle_H
 #define indexedParticle_H
 
-#include "Particle.H"
+#include "particle.H"
 #include "IOstream.H"
 #include "autoPtr.H"
 
@@ -51,7 +50,7 @@ namespace Foam
 
 class indexedParticle
 :
-    public Particle<indexedParticle>
+    public particle
 {
     // Private data
 
@@ -65,7 +64,7 @@ public:
         //- Construct from components
         indexedParticle
         (
-            const Cloud<indexedParticle>& c,
+            const polyMesh& mesh,
             const vector& position,
             const label cellI,
             const label tetFaceI,
@@ -73,47 +72,44 @@ public:
             const label index = 0
         )
         :
-            Particle<indexedParticle>(c, position, cellI, tetFaceI, tetPtI),
+            particle(mesh, position, cellI, tetFaceI, tetPtI),
             index_(index)
         {}
 
         //- Construct from components, with searching for tetFace and tetPt
         indexedParticle
         (
-            const Cloud<indexedParticle>& c,
+            const polyMesh& mesh,
             const vector& position,
             const label cellI,
             const label index = 0
         )
         :
-            Particle<indexedParticle>(c, position, cellI),
+            particle(mesh, position, cellI),
             index_(index)
         {}
 
         //- Construct from Istream
         indexedParticle
         (
-            const Cloud<indexedParticle>& c,
+            const polyMesh& mesh,
             Istream& is,
             bool readFields = true
         )
         :
-            Particle<indexedParticle>(c, is, readFields)
+            particle(mesh, is, readFields)
         {}
 
         //- Construct as a copy
         indexedParticle(const indexedParticle& p)
         :
-            Particle<indexedParticle>(p)
+            particle(p)
         {}
 
         //- Construct and return a clone
-        virtual autoPtr<Particle<indexedParticle> > clone() const
+        virtual autoPtr<particle> clone() const
         {
-            return autoPtr<Particle<indexedParticle> >
-            (
-                new indexedParticle(*this)
-            );
+            return autoPtr<particle>(new indexedParticle(*this));
         }
 
 
diff --git a/src/lagrangian/basic/indexedParticle/indexedParticleCloud.C b/src/lagrangian/basic/indexedParticle/indexedParticleCloud.C
index 2ef5de0b23..1e09140c0c 100644
--- a/src/lagrangian/basic/indexedParticle/indexedParticleCloud.C
+++ b/src/lagrangian/basic/indexedParticle/indexedParticleCloud.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2004-2010 OpenCFD Ltd.
+    \\  /    A nd           | Copyright (C) 2004-2011 OpenCFD Ltd.
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -29,7 +29,6 @@ License
 
 namespace Foam
 {
-    defineParticleTypeNameAndDebug(indexedParticle, 0);
     defineTemplateTypeNameAndDebug(Cloud<indexedParticle>, 0);
 }
 
diff --git a/src/lagrangian/basic/passiveParticle/passiveParticle.H b/src/lagrangian/basic/passiveParticle/passiveParticle.H
index 2052065155..23a28c9c12 100644
--- a/src/lagrangian/basic/passiveParticle/passiveParticle.H
+++ b/src/lagrangian/basic/passiveParticle/passiveParticle.H
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2004-2010 OpenCFD Ltd.
+    \\  /    A nd           | Copyright (C) 2004-2011 OpenCFD Ltd.
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -25,15 +25,17 @@ Class
     Foam::passiveParticle
 
 Description
+    Copy of base particle
 
 SourceFiles
+    passiveParticle.H
 
 \*---------------------------------------------------------------------------*/
 
 #ifndef passiveParticle_H
 #define passiveParticle_H
 
-#include "Particle.H"
+#include "particle.H"
 #include "IOstream.H"
 #include "autoPtr.H"
 
@@ -48,7 +50,7 @@ namespace Foam
 
 class passiveParticle
 :
-    public Particle<passiveParticle>
+    public particle
 {
 
 public:
@@ -58,53 +60,50 @@ public:
         //- Construct from components
         passiveParticle
         (
-            const Cloud<passiveParticle>& c,
+            const polyMesh& mesh,
             const vector& position,
             const label cellI,
             const label tetFaceI,
             const label tetPtI
         )
         :
-            Particle<passiveParticle>(c, position, cellI, tetFaceI, tetPtI)
+            particle(mesh, position, cellI, tetFaceI, tetPtI)
         {}
 
         //- Construct from components, with searching for tetFace and
         //  tetPt unless disabled by doCellFacePt = false.
         passiveParticle
         (
-            const Cloud<passiveParticle>& c,
+            const polyMesh& mesh,
             const vector& position,
             const label cellI,
             bool doCellFacePt = true
         )
         :
-            Particle<passiveParticle>(c, position, cellI, doCellFacePt)
+            particle(mesh, position, cellI, doCellFacePt)
         {}
 
         //- Construct from Istream
         passiveParticle
         (
-            const Cloud<passiveParticle>& c,
+            const polyMesh& mesh,
             Istream& is,
             bool readFields = true
         )
         :
-            Particle<passiveParticle>(c, is, readFields)
+            particle(mesh, is, readFields)
         {}
 
         //- Construct as copy
         passiveParticle(const passiveParticle& p)
         :
-            Particle<passiveParticle>(p)
+            particle(p)
         {}
 
         //- Construct and return a clone
-        virtual autoPtr<Particle<passiveParticle> > clone() const
+        virtual autoPtr<particle> clone() const
         {
-            return autoPtr<Particle<passiveParticle> >
-            (
-                new passiveParticle(*this)
-            );
+            return autoPtr<particle>(new passiveParticle(*this));
         }
 };
 
diff --git a/src/lagrangian/basic/passiveParticle/passiveParticleCloud.C b/src/lagrangian/basic/passiveParticle/passiveParticleCloud.C
index aaa509b42f..cbdaea70aa 100644
--- a/src/lagrangian/basic/passiveParticle/passiveParticleCloud.C
+++ b/src/lagrangian/basic/passiveParticle/passiveParticleCloud.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2004-2010 OpenCFD Ltd.
+    \\  /    A nd           | Copyright (C) 2004-2011 OpenCFD Ltd.
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -29,7 +29,6 @@ License
 
 namespace Foam
 {
-    defineParticleTypeNameAndDebug(passiveParticle, 0);
     defineTemplateTypeNameAndDebug(Cloud<passiveParticle>, 0);
 }
 
diff --git a/src/lagrangian/basic/passiveParticle/passiveParticleCloud.H b/src/lagrangian/basic/passiveParticle/passiveParticleCloud.H
index aa3d2c2659..b6ee6f12cc 100644
--- a/src/lagrangian/basic/passiveParticle/passiveParticleCloud.H
+++ b/src/lagrangian/basic/passiveParticle/passiveParticleCloud.H
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2004-2010 OpenCFD Ltd.
+    \\  /    A nd           | Copyright (C) 2004-2011 OpenCFD Ltd.
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -62,9 +62,6 @@ class passiveParticleCloud
 
 public:
 
-    //- Type of parcel the cloud was instantiated for
-    typedef passiveParticle parcelType;
-
     // Constructors
 
         //- Construct given mesh