1. Diary of a journey through Mongolia and Tibet in 1891 and 1892 [electronic resource] / by William Woodville Rockhill. Rockhill, William Woodville, 1854-1914 Washington : Smithsonian Institution, 1894 (W.F. Roberts) Book Online
2. The ancient pit-dwellers of yezo [electronic resource] / by Romyn Hitchcock. Hitchcock, Romyn, 1851-1923 [Washington : G.P.O., 1890?] Book Online
3. Narrative of the expedition of an American squadron to the China seas and Japan [electronic resource] : performed in the years 1852, 1853 and 1854, under the command of Commodore M.C. Perry, United States Navy / by order of the government of the United States ; compiled from the original notes and journals of Commodore Perry and his officers, at his request, and under his supervision, by Francis L. Hawks. Perry, Matthew Calbraith, 1794-1858 Washington, D.C. : A.O.P. Nicholson, 1856. Book Online
4. Report of the Secretary of the Navy [electronic resource] : with a report made by Lieutenant W.F. Lynch of an examination of the Dead Sea. United States. Navy Department [Washington : s.n.], 1849. Book Online