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H.M.S. CHALLENGER Entering Bermuda. April 3, 1873 from the CHALLENGERSKETCHBOOK by B. Shepard. This work was discovered by J. Welles Henderson, abenefactor of the Philadelphia Maritime Museum. Accompanying text wasdeveloped by Harris B. Stewart, oceanographer, marine science historian, andthen head of NOAA's Atlantic Oceanographic and Meteorological Laboratories.