Source: “S. S. Lucania, July 28, 1894.” Photograph by John S. Johnston. Detroit Publishing Company Collection, Library of Congress, http://www.loc.gov/pictures/item/det1994011734/PP/. Photoshopped. I discuss the image in detail at http://theartpart.jonathanmorse.net/identities-unhidden/.
Percy Loomis Sperr, “Post Graduate Hospital: girl in bed looks up from book,” 1923. New York Public Library Digital Collections, images http://digitalcollections.nypl.org/items/510d47da-e30a-a3d9-e040-e00a18064a9 and http://digitalcollections.nypl.org/items/510d47da-e309-a3d9-e040-e00a18064a9. Merged to anaglyph and photoshopped.