Most of the collection consists of handwritten copies of original documents relating in the main to the development of East Leake, Nottinghamshire, but also concerning West Leake, Keyworth and Tollerton in Nottinghamshire and Wymeswold in Leicestershire. These copies were made by Sidney Potter in the late 19th/early 20th century from documents dating from 1329. They include maps and plans, property documents, manorial court material and extracts from parish registers. Two early original documents are present: a feoffment of the Manor of East Leake (1569) and a conveyance of premises in East Leake (1646).
Potter's own research notes and annotations provide references to additional material. The later material is supplemented by volumes of newspaper cuttings and some correspondence. A manuscript volume of Potter's History of East Leake (1903) is also present. The collection includes a list of 91 plants collected in the Nottinghamshire parishes of Bunny and East Leake.