The development of open-cast ironstone mining has made necessary emergency excavations on an apparently undefended Iron Age and Romano-British settlement of at least 20 acres, situated immediately near the Jurassic Way six miles south of the Humber estuary. In the Iron Age, the site was characterized by complex ditch systems and small irregular gullies, and only two huts, both circular, have been located in an excavated area of 1.7 acres. The main occupation probably began around 100 B.C. with an Iron B pottery assemblage. The sequence continued, apparently without abrupt break, into an Iron C assemblage very closely related to the ‘Aylesford—Swarling Culture’ of the Thames estuary region. More marked modification early in the first century A.D., most clearly defined by the introduction of Gallo-Belgic pottery, resulted in cultural similarities with Camulodunum. The occupation continued throughout the Roman period. The site was then characterized by an irregular system of metalled roads flanked by ditches, and plots of land defined by ditches and fences. Within these plots stood individual rectangular buildings of timber and stone, together with ovens, wells, pottery kilns, and other structures of an industrial or agricultural nature.