Aviator, navigator, naturalist, and inventor. Research notes, subject files, and indexes used in preparation of Gatty's books, Raft Book: Lore of the Sea and Sky (1943) and Nature Is Your Guide (1958), together with correspondence, charts, maps, drawings, bibliographies, clippings, and other papers relating to navigation.

Navigator, trader, and explorer. Ingraham's account of the voyage of the brigantine Hope from Boston to the Falkland Islands, Cape Horn (Chile), Marquesas Islands (French Polynesia), the Northwest Coast of North America, the Sandwich Islands (Hawaii), and China, including commercial trade, especially the fur trade, with China.