Preliminary survey of Point Reyes and Drake's Bay, California / U.S. Coast Survey; geographical positions by George Davidson, assistant; topography by J.S. Lawson, sub-assist.; hydrography by the party under the command of Lieut. J. Alden, U.S.N. assist.
Relief shown by hachures. Depths shown by soundings and shading. At head of title: (J No. 6). "Redd. drng. by E. Fairfax. Engd. by A. Maedel." Includes text. Scale 1:40,000 (W 122?58?/N 38?00?).
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