Ocean passages for the world : Winds and currents /
Great Britain.Hydrographic Department.
Somerville, Henry Boyle Townshend.
London  : H.M.S.O.,
1923.
Maps folded and inserted in back pocket: X.18 Pacific, Atlantic and Indian Oceans : diagram of ocean currents -- X.41 Atlantic, Indian, and Pacific Oceans : diagrams of oceanic winds -- X.42 Atlantic Ocean steam ship routes -- X.43 Indian Ocean steam ship routes -- X.44 Pacific Ocean steam ship routes -- X45 The World sailing ship routes.