1 in the diagram). This trench was extended northwards, finding first a long causeway of unexcavated chalk, and then the southern end of the next ditch in the circuit. The ditch at the south end of trench 1 was about deep and yielded 912 sherds of Neolithic pottery and plentiful flint flakes; the one at the north end was only a foot deep and contained flints, but no pottery except a few fragments of early Iron Age and Romano-British pottery, just below the turf line. The causeway was cleared down to the chalk but there were no post-holes. Musson also investigated the bank of earth next to the ditch (trench 2 in the diagram), clearing an area to search for post-holes, but none were found. The pottery found in the southern ditch was all identified as Ebbsfleet ware. It was not deposited at the bottom of the ditch; Musson's report shows a layer of silting below the layer containing pottery and flints, and Peter Drewett, an archaeologist who summarized Musson's work in a later review of the site, describes the pottery as a "dump", on top of a layer of "clean chalk rubble" a foot thick. Only five animal bones were found, four of ox and one from a pig. Charcoal fragments of ash, hawthorn and hazel were found; there was no oak, which was unusual, and in his later review Drewett suggested this might indicate the landscape had been cleared. Drewett arranged for some of the charcoal found by Musson to be radiocarbon dated, and the result was a date range of 3500 to 3300 BC. The enclosure was probably constructed before this range, which matches the dates known for the pottery Musson found. A pair of tabular flints, which Musson identified as a hearth, were found in the ditch, associated with some of the bones and charcoal. A later review, as part of the Gathering Time project to date Neolithic enclosures, suggested that the lack of signs of burning cast doubt on this identification, and also commented that the steep sides of the ditch shown in Musson's section diagram might indicate that the ditch had been recut there. Musson's flint finds included a leaf-shaped arrowhead, though this had been lost by the time Drewett conducted his review. The snail shells found at different levels below the surface were analyzed in Musson's report, but no conclusions were drawn at