This discovery was made as a result of rescue excavation in advance of road improvements by the Dorset County Council in the autumn of 1962. The site (NGR SY/99789918) now lies in the north verge of the A31 trunk road, 500 feet towards Wimborne Minster from the new Lake junction to Corfe Mullen, but in 1962 it was still included in field No. 7924, belonging to Lake Farm. Here the land, which forms part of the flood-plain of the Stour, is crossed by a spur of slightly more elevated ground extending north from Willetts Lane. There is a gentle slope westwards from the site towards the Chillwater Stream, which flows north to the Stour after descending from higher ground. The lowlying terrain to the west of this low spur used to be marshland until its reclamation, accounting for the name ‘lake’ given to the locality. The subsoil of the valley-bottom is composed variously of gravel, shingly stones and brown alluvial loam. The original vegetational cover would have been woodland of deciduous type, extending from the floor of the valley up the slope to the south and thinning out to scrub and heath on the gravel plateau 150 feet above the Stour. Today, pasture dominates the scene, with oak prominent only in hedgerow or isolated clumps.
The pit to be described below lay just over half a mile to the north-east of the site of one similar in shape and contents that was discovered in a quarry in Corfe Mullen parish some twenty-five years ago.