The documents, transferred from the Admiralty, consist of twelve plans. Five of them are of the whole yard; two date from ca.1740 and the others from 1810, 1845, and 1878 respectively. The 1878 plan includes the adjoining victualling yard. Alterations in the nineteenth century are shown in plans of the proposed new entrances to the wet dock, 1813, and mast pond, 1828; and the proposed slips off the basin, 1844. The final plan is of three detailed sections through the single and double docks and shows dimensions and building materials, 1838