The collection, purchased by Sir James Caird in 1938, mainly consists of eleven volumes of copies, some of them contemporary, of original documents. Dating from the early seventeenth century is a copy of 'Admiralli Angliae a tempore regis Edwardi secundi ano 1307 ad anui domini 1590'; some notes added to the text in a different hand extend this list of admirals to cover the years 1264 to 1618. Slightly later is a seventeenth-century copy of judges' opinions regarding the payment of ship money, 1638. There is a collection of bound documents relating to naval administration which includes copies of 'A brief discourse of the Navy', 1638, and 'The Navy Ript and Ransact', ca.1659, by John Hollond (fl.1624-1659) (printed in Hollond's Discourses, ed. J.R. Tanner, Navy Records Society, 1896). Also relating to politics and maritime affairs is a volume of original seventeenth- and early eighteenth-century documents compiled ca.1815 by an antiquarian, William Hamper (1776-1831). Four volumes, possibly compiled for or by Josiah Burchett, Secretary to the Admiralty, (1666?-1746), contain notes, transcripts and some original documents relating to the Navy, 1659 to 1743; they include copies of orders issued by the Admiralty and King in Council and a volume of accounts, tables and orders relating to the equipment, management and expense of maintaining the Navy, including the dockyards, ca.1732. Notes and transcripts, ca.1799, formerly belonging to William Locker (1731-1800) comprise two volumes; these were compiled for a history of the Navy and include some biographical sketches of naval officers. Finally, there is the log of the H.E.I.C.S. Melville Castle, 1786 to 1788.

Administrative / biographical background
The volumes in this collection were originally part of one formed at Clumber House by Henry Pelham, fourth Duke of Newcastle (1785-1851).