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38 A very curious feature of this sand is the presence of many small snail shells. These snail shells were ubiquitous throughout the clean sand fill. For example, field notes from unit C3, at the back of Gallery 58, describe the retrieval of a "double handful [of snails], 100 plus specimens" from the sand fill. The snail shells must indicate wetter conditions than at present across Area C, or a cycle of wetter periods, when the snails could proliferate, and drier periods when the snails died and their shells were trapped in the accumulating sand. We plan to have our samples of snail shells analyzed ...