The principal series include the papers of Sir William Coventry (1628?-1686), 1585 to 1680, in the possession of the Marquess of Bath; the Royal Greenwich Observatory papers, 1674 to 1892, and the Board of Longitude papers, 1714 to 1829, held by the Royal Greenwich Observatory; and papers of Admiral Sir John Duckworth (q.v.) 1793 to 1813, held by Yale University and other repositories in North America. The remaining microfilms are mostly of smaller items, some obtained in fulfilment of conditions to secure an export licence. Examples of these include copies of the journals of Augustus Keppel (q.v.) kept during Anson's circumnavigation, 1739 to 1744; of Captain Cook (1728-1779) in the ENDEAVOUR, 1768 to 1770; and of Sir Joseph Banks (1743-1820) kept during the same voyage, 1768 to 1771.

Administrative / biographical background
Copies of Volumes and Documents - Microfilms