also maybe interesting, but not solcing the actual question.....
There are two contemporary drawings of the Rattlesnake and Cormorant existing
View attachment 415222
View attachment 415223
Cormorant (captured 1781)
Scale: 1:48. Plan showing the body plan, stern board outline with decoration detail, sheer lines with inboard detail and figurehead, and longitudinal half-breadth for Cormorant (captured 1781), a captured American privateer, as fitted at Plymouth dockyard as a 12-gun Ship Sloop.
Signed by John Henslow [Master Shipwright, Plymouth Dockyard, 1775-1784]
Reverse: Quarterdeck, forecastle, upper deck and fore & aft plaforms with table of Mast and Yard dimenions for Cormorant (captured 1781).
www.rmg.co.uk