The collection includes the stock books in which Warner kept records of the purchase and sale prices of the antiques in which the business dealt. There are records of the financial transactions of the business including accounts, cash books and receipt books.
Of particular note are the detailed day books which record purchases from Warner by individuals and companies from 1936-1984. The collection contains notebooks detailing buying trips, some correspondence, auction catalogues and photographs.
The collection also contains records of Warner's stamp dealing.