Chart of the bay of San Pablo, Straits of Carquines, and part of the bay of San Francisco : California / by Cadwalader Ringgold, Commander, U.S. Navy ; assisted by Simon F. Blunt, Lieut., U.S.N., 1850.Ringgold, Cadwalader, 1802-1867[1851?]"Entered according to act of Congress in the year 1851 by Cadwalader Ringgold ....""Projected, constructed & drawn by Fred D. Stuart, hydrographer, late of the U.S. Ex. Ex. ; assisted by A.H. Campbell, civil engineer.""Sheet no. 2."Inset views: Mark for invincible buoy, north extreme of Marin Is. on with clump of trees north of San Rafael -- Mark for invincible buoy, Point Smith, east end of Angel I. on with Signal Hill.cartographic