Scope and Contents At Gen.28-31 the Challenger Papers contain sheets of plates illustrating various marine life forms, and original drawings of marine life forms; engravings, lithographs, photographs, etc. of marine life forms; drawing and engravings of Challenger equipment; and, statistical material, graphs, charts and maps. There are drawings, engravings and photographs of Challenger personnel at various tasks, and of Challenger and its interiors; and, pictures of people and places (not Challenger...