Map of the harbors of Puget Sound and Cowlitz Valley, Washington Territory : from the United States land surveys / engraved, printed and manufactured by G.W. & C.B. Colton & Co.G.W. & C.B. Colton & Co1870]"Entered according to Act of Congress in the year 1870 by G.W. & C.B. Colton & Co. in the Clerk's Office of the District Court of the United States for the Eastern District of New York."Relief shown by hachures. Depths shown by soundings.cartographic