Scale 1:48 . Plan showing the upper deck plan, inboard profile and lower deck with platforms for a new 18-gun Corvette, sent to Portsmouth Dockyard for Fly (1831) and Harrier (1831), and sent to Plymouth dockyard for Argus (cancelled 1831), Acorn (cancelled 1831), all 18-gun Corvettes, designed by the School of Naval Architecture, Portsmouth. Annotation on the front in red ink: "The alterations in red, which are agreeably to recent regulations, are to be conformed to."