The Great Eastern Under Weigh, July 23rd, 1865: Escort and other Ships, H.M.S. Terrible, H.M.S. Sphinx, The Hawk and Revised: The Caroline, 1865?66, Watercolor over graphite with touches of gouache, Sheet: 7 1/4 ? 12 1/2 in. (18.4 ? 31.7 cm), Drawing