Challenger (1858); Racoon (1857); Clio (1858)

Scale: 1:48. Plan showing the body plan with half-stern board outline, sheer lines, and longitudinal half-breadth proposed (and approved) for building Challenger (1858), Racoon (1857), and Clio (1858), all 20-gun corvettes with covered decks built on the lines of Pearl (1855).

Signed by Captain Sir Baldwin W. Walker [Surveyor of the Navy, 1848-1860]
Signed by John Edye [Assistant Surveyor of the Navy?]
Signed by Isaac Watts [Assistant Surveyor of the Navy]
Initialled by James Graff [Draughtsman, First Class]?