The contents of the collection, which date from the 13th to the 20th century, are very miscellaneous but, in addition to many deeds, include, for instance, some examples of the following types of records: manorial records, accounts (including some Durham Bishopric estate account rolls), ecclesiastical records (Church of England diocese of Durham), business records, solicitors' papers, legal records, electoral and political papers, papers concerning the Durham City guilds, including the Durham City goldsmiths' (now plumbers') company, University of Durham records, personal papers, correspondence, biographical and genealogical notes, photographs, plans, prints and printed journals and pamphlets. Most items are originals but a few are copies.
Most accessions concern the North-East of England, including Northumberland and Yorkshire but with Durham City and County Durham being particularly well represented. There are also odd items relating to Bedfordshire, Kent, Lincolnshire and Scotland and to Africa, Canada, China, Corfu, France and the United States of America.