Scale 1:48. A drawing for the Royal yachts Catherine (not built) and William and Mary (1807), made at the Navy Office and dated 20 November 1800. Showing sheer lines, body plan with stern board, and longitudinal half-breadth. With the title: 'A draught proposed for Building two yachts for His Majesties service in the room of the Catherine and William & Mary prepared in pursuance of an order from the Right Honorable the Lords Commissioners of the Admiralty dated the 24th September last'. Signed by the Surveyor of the Navy John Henslow.