Carte des Decouvertes Faites dans lesRegions Arctiques en 1829-33.

An informative and important map of the discoveries made in the Arctic Regions in 1829-33 by Sir John Ross (1777-1856) in the Hydrographic Office of the Admiralty. Engraved by Charles Schreiber and lithographed by Thierry Freres in Paris in 1835. This map came folded in an unidentified book.
There is no such map for sale (Past or Present) on the Internet. A necessary map for serious collectors of maps regarding “The North West Passage”.
The map has six small views of harbours in various locations on the map. These views are in different positions. I have never seen that on a map.

The map tracks the second expedition of John Ross in Canada’s Northwest Territories, during which Ross discovered King William Island, Boothia Peninsula, and the Gulf of Boothia. Ross named the latter two discoveries after his backer, London gin magnate, Felix Booth. His nephew, James Clark Ross, is credited as the first European to reach the North Magnetic Pole during the same expedition on June 1, 1831.

When the party’s ship was crushed by ice, he and his crew were stranded. The men spent one of the four difficult Arctic winters at "Somerset House," which can be located on the map west of Prince Regent Inlet. This was also the wreck site of the HMS Fury from William Parry’s 1825 expedition.
When Ross and company were finally rescued by whalers in the summer of 1833, the whalers grimly informed Ross that he could not be who he claimed because Captain Ross had died in the Northwest Passage two years earlier. Upon returning to England, Ross was greeted as a hero and knighted the next year. Sir John Ross and his crew’s four winters in the Arctic constituted a survival record that would not be broken for more than seventy years.