Oregon : report of Lieut. Neil M. Howison, United States navy, to the commader of the Pacific squadron ; being the result of an examination in the year 1846 of the coast, harbors, rivers, soil, productions, climate, and population of the territory of Oregon. February 29, 1848 ; ordered to be printed . - Howison, Neil M., -1848 (History of the Pacific Northwest, 1965)