the time. A subsequent re-analysis, based on extracting more snail shells from soil samples preserved from Musson's dig, was undertaken by K. D. Thomas, an expert on molluscs, for Drewett's 1994 review. Thomas concluded that the enclosure had been constructed in woodland that was still standing or had only recently been cleared. Seton-Williams, 1962 Veronica Seton-Williams spent two weeks, from 1 to 15 July 1962, excavating the site as a training exercise for a group of about twenty. She did not publish her work, but her notes and some of the finds survive, and were used by Peter Drewett in a 1994 review of the site. A total of 21 trenches were dug; Drewett comments that the reasons for the positioning of some of the trenches are unclear, and "may be explained partly by the fact that the project was run as a training excavation". Trench A was dug across both the inner ditch and associated bank, revealing no evidence that the bank, which contained the material excavated from the ditch, had been reinforced. Trench B crossed the outer ditch and bank; a few sherds of Romano-British pottery were found in the upper layers of the trench, but nothing from within the ditch. Once the ditch had silted in, another shallow cut had been made, which Drewett dates to the Romano-British period, based on the pottery found in the layers inside the recut. In both cases the ditch appears to have silted in quickly. A set of six grid squares and a rectangular area (marked C on the diagram) were excavated over one of the causeways, finding 278 pieces of struck flint, all from the turf and topsoil layer; Drewett suggests that the causeway may have been an area where flint cores were prepared. Trench D was in the middle of the enclosure, and revealed no finds. A series of 7 trenches, labelled E1 through E7, were cut through the ditch and bank just south of the causeway where the C trenches were dug. As with the ditch to the north it appeared that the ditch had filled with natural silt rather than having been deliberately filled in, and Drewett estimated that the lowest levels of silting might have formed within a year or two of the ditch being dug. On top of these silt layers, three polished flint axes were found deposited next to each other in trench E6.