The papers comprise a mixture of Munby's own correspondence and papers (MS.Add.8203/D, E; 8229; 8307; 8308) and manuscripts which he collected (MS.Add.8199-8202; 8203/A, B, C; 8204-8213; 8219-8228). The former contain a wide range of subject matter, while the latter are mainly of bibliographic interest, comprising letters of printers, booksellers, book collectors and librarians, and catalogues and ledgers.