Relief shown by hachures; depth shown by bathymetric soundings. At head of title: South America, east coast. "Published ... 10th. Feby. 1857 under the superintendence of Captn. Washington R.N., F.R.S., hydrographer. Corrections to July 1858. Corrections Feby. 1864. Decr. 1864. Decr. 65." Insets: Ensenada de Barragan / surveyed by F. Hunter, Secd. Master -- Lobos / from the French survey -- Anchorages of Folonio & Castillos / from the French chart.