London, 1801. First printing of the important early map for Northwest and Polar exploration, showing part of the route of the first European to cross North America, the portion of MacKenzie's route from Fort Chipewyan (Lake Athabasca) to Whale Island (current day Garry Island, Arctic Ocean), in the summer of 1789.In this journey of 3,000 miles over 102 days, MacKenzie reached the Arctic Ocean, rather than the Pacific. It was not until 1793 and a second journey that he crossed the Rocky Mountains and famously inscribed a record in red paint on a rock, "Alex Mackenzie from Canada by land 22d July 1793". MacKenzie's discoveries helped bolster the British claim on the entire Pacific Northwest, and, as a counter measure to this claim, inspired Thomas Jefferson to commission the Lewis & Clark expedition. Copper engraved map on laid paper with some offsetting, contemporary folds, closed tear restored from the back, into plate, otherwise good condition. 22 x 23 1/2". Wheat 251. (Inventory #: 22398)
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