Scale: 1:24. Plan showing the quarter gallery elevation, half-plan of the upper deck sill, and half-plan of the quarterdeck rail for Hamadryad (1823), and Thisbe (1824), all 46-gun Fifth Rate Frigates building at Pembroke Dockyard. The plan illustrates the details of the circular stern including the iron knees on the quarterdeck, the position of the sashes, and the water closet on the upper deck.

Signed by Robert Seppings [Surveyor of the Navy, 1813-1832].