Relief shown by hachures. Depths shown by soundings. "Additional soundings by Lieut. Owen Stanley R.N." "Published according to Act of Parliament by Capt. Hurd R.N. Hydrographer to the Admiralty 11th. Novr. 1817. Additions to 1835 & 1859. Corrections Jan. 1864." At head of title: South America. "574."