"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.