Depths shown by soundings. Polar projection. Depths shown for Bering Sea only. "Published according to act of Parliament by Capt. Hurd, R.N., Hydrographer to the Admiralty, 14th. Feby. 1818."
Relief shown by hachures. Depths shown by soundings. Insets: North Star Bay -- Omenak Fiord -- Disko Bay. "Published according to Act of Parliament at the Hydrographic Office of the Admiralty Decr. 14th 1852." "Fredk. H. Hoadley, No. 9,...