This monograph provides the full account of the discovery, excavation and subsequent analysis of remains from a sequence of rich archaeological horizons found late in the construction programme and dating to early in the Palaeolithic period, associated with the Hoxnian interglacial between approximately 425,000 and 375,000 years ago. The highlight of this work was the identification of the remains of the carcass of an extinct straighttusked elephant Palaeoloxodon antiquus, surrounded by the undisturbed scatter of flint tools used for its butchery, made and abandoned at the spot.