"H.M.S

“H.M.S. CHALLENGER. St. Michall. July 7, 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 was developed by Harris B. Stewart, oceanographer, marine science historian, and then head of NOAA’s Atlantic Oceanographic and Meteorological Laboratories.