Description from the Inventory to Glyn Daniel’s “The Prehistoric Chamber Tombs of England and Wales” (1950 Cambridge University Press) p240:
A round barrow 25ft in diameter with a depression in the centre revealing what is either a large cist or (more probably) a ruined entrance grave of Scilly type: the chamber is roofed with a megalith 4ft 6in by 4ft. (See J.T. Blight, AC, 1867, p.334.)