Interglacial organic deposits, at Wortwell in Norfolk, containing bones of Elephas antiquus, plant remains and molluscs, are shown to be of Ipswichian age. The plant and molluscan assemblages of an early part of the interglacial and of the mixed oak forest zone are described and compared with similar assemblages from Ipswichian and Hoxnian deposits. The relation between this deposit and other local Pleistocene deposits in the Waveney valley is discussed.