The documents, from Admiralty records, consist of seven plans of the earlier south yard, ca.1720, 1748, ca.1760, 1808, 1821, ca.1840, and 1864. Only two, the 1821 and ca.1840 plans, are not to scale and all are either labelled or have a key to the facilities shown. The plan of ca.1760 gives the cost of each building in the yard and that of 1808 shows a proposed reservoir and the course of cast-iron pipes for fire-fighting purposes and for watering ships. The main records for this yard are in the Public Record Office (ADM/174). t