Scale 1:48. Plan showing the body plan with modifications, sheer lines with modifications, longitudinal half breadth for building Daphne (cancelled 1832), Porcupine (cancelled 1832), both 28-gun, Sixth Rate Sloops, at Plymouth Dockyard. The modifications relate to completing both ships as 20-gun Cornttes in 1830. Signed Henry Peake and Robert Seppings (Surveyors of the Navy). Annotation in the top right: "Navy Office, May 1823. The alterations made b ticked lines in the forebody to be conformed to in building The Daphine and Porcupine. R.S."
"Navy Office, 13th Feby 1830. The alterations in green to be complied with for the Forecastle & Roundhouse & those in red for the Sheer and Channels: for the Head and Quater Galleries to conform to thew alterations shown on the profile dated 28th June 1827. R.S." [see ZAZ3419]