A Neolithic long barrow, the largest of the Severn-Cotswold group of megalithic tombs, in Wiltshire, England, of c 3500 BC. The tomb has two pairs of transepts and a terminal chamber; the entrance opens from a crescent-shaped forecourt blocked by a straight facade of sarsen slabs. The burial was of 46 disarticulated inhumations and the chambers were filled with a mixture of soil, charcoal, sherds of Peterborough ware, and grooved ware and beaker fragments. That material has a date of 2500/2000 BC.