This report draws together the archaeology of Old Sleaford in Lincolnshire describing chiefly the results of Margaret Jones' excavations in the 1960s, as well as older and more recent discoveries. The evidence shows that there was a large late Iron Age settlement covering more than 30 hectares, and the finds include an enormous quantity of debris - fragments of pellet-moulds and crucibles - from a large Iron Age mint. The report also covers the later Roman settlement, the Anglo-Saxon and medieval material and there is a tribute to the work of Margaret Jones.