Nice example of the first edition of OW Gray's Map of the World on Mercator's Projection, still bearing the imprint of JH Colton, 1855.
Shows the routes of numerous 18th and 19th Century explorers, including Cook, Furneaux, Vancouver, the US/Vincennes voyage, La Perouse, Resolution, etc., with the years of the relavent journey. Colored by countries. The first signs of the Antarctic Coast are shown.
While the world is now taking a nearly final shape, the geopolitical borders are still evolving in this interesting mid 19th Century World map.