Records relating to the day - to day running of the business, comprising letters received, 1890 - 1965; letters of incoming business, 1907 - 1965; letters of outgoing business, 1918 - 1965; Turbon business letters, 1915 - 1950; miscellaneous letters, 1852 - 1964; general accounts, 1888 - 1956; subsidiary accounts, 1855 - 1972; financial costs books, 1891 - 1965; banking, 1898 - 1965; quotation books, 1888 - 1894; order books, 1866 - 1868; Ministry of Supply contracts, 1940 - 1944; sales books, 1907 - 1954; day books, 1953 - 1970; invoices raised, 1890 - 1965; index registers of fans supplied, [c.1891 - 1940]; after sales, 1929 - 1968; delivery books, 1873 - 1965; delivery rates and costs, 1876 - 1911; invoices received, 1888 - 1948; credit, 1936 - 1949; brochures and articles, 1891 - [c.1920]; acquired miscellaneous printed items, 1863 - [1968]; photographs and illustrations, 1907 - 1957.
Arranged into twenty - four series.