Records of the Corporation of London Libraries Committee, comprising record made in 1923 of proceedings taken by the Committee to protect the Library holdings from air raid damage during the First World War; album of letters, 1910; and letters from the Chairman of the Committee to Thomson Hankey, who had been critical of the Library in a letter to the Times newspaper, 1869.

Records relating to Guildhall Library, comprising guides, catalogues and indexes to collections in the Library, including the Sun Insurance Office policy registers and City of London parish marriage licences.