Scale 1:48. A drawing of the Royal yacht Mary (1728), made at Deptford Dockyard and dated 18 July 1772. Showing sheer lines with internal detail, body plan, longitudinal half-breadth, and tables of dimensions, masts and spars (ketch rig). With the title: 'A draught of His Majesties Yacht Mary, her body taken off on the slip next the Single Dock'.