Drawing of the Flat Bottom Boats as built by Mr Waterman for the Transport Service / Admiralty (& Devonport Dockyard). 1854 Apr 20. [1 sheet (on roll with others), line drawing, part with wash, scale 3/4" : 1'. Includes ms. particulars added 11 May 1854] Drawing of the Flat Bottom Boats as built by Mr Waterman for the Transport Service/Admiralty