"H.M.S

“H.M.S. CHALLENGER, at St. Vincent. & H.M. Troop Ship SIMOON leaving fore the Gold Coast, with Marines, July 30, 1873” from the CHALLENGER SKETCHBOOK by B. Shepard. This work was discovered by J. Welles Henderson, a benefactor of the Philadelphia Maritime Museum. Accompanying text by Harris B. Stewart, oceanographer and marine science historian, then head of NOAA AOML.