Chart of the Farallones and entrance to the bay of San Francisco : California / by Cadwalader Ringgold, Commander, U.S. Navy ; assisted by Simon F. Blunt, Lieut., U.S. Navy, 1850.Ringgold, Cadwalader, 1802-1867[1851?]"Constructed, projected and drawn by Fred D. Stuart, hydrographer, late of the U.S. Ex. Ex.""Entered according to act of Congress in the 1851 by Cadwalader Ringgold ....""Sheet no. 1."Inset view: Entrance to San Francisco.Place names in English and Spanish.cartographic