This can be found by taking a lane running north of the village of St Neot towards Colliford lake. When the road turns into a muddy track, the mound, as it is marked on maps, is just inside a gate on the right.
In Robin Payne’s Romance of the Stones it is called the Penkestle Menhirs and is described as a multi phase cairn, the standing stones being added at a later date.
The mound does lie on private ground, but a quick hop over the gate isnt gonna upset anybody.