Sais II: The Prehistoric Period publishes the EES/Durham/SCA excavations carried out in 2007 in the 'Great Pit' at Sa el-Hagar, ancient Sais. It contains a full discussion of the layers dating to the Neolithic and Buto-Maadi Periods, with specialist reports on the chipped and ground stone tools, small finds, pottery, animal bones and flora. As the only Neolithic site so far excavated on the Nile floodplain in Egypt, the site has important implications for understanding the Neolithisation of the Delta and the development of Predynastic settlements in the north of Egypt.