Title: Rocks in San Francisco Harbor, California. Letter from the Secretary of War, transmitting, with a letter from the Chief of Engineers, reports of examination and survey of Mission Bay rocks, Packard rock, Whiting rock, Fifteen-Foot rock, Invincible rock, Noonday rocks, and Anita rock; also Centissima and Sears rocks, and two other rocks near Mail Dock, in Bonita Channel, San Francisco Harbor, California
Subjects: Harbors, Topographical surveying, Geology