Rare Henri de Leth edition of Guillaume De L'Isle's map of the Northern Hemisphere, originally published by Gulliaume De L'Isle in 1714.
The map shows many of the later cartographic myths and anomallies of the second half of the 18th century, most notably the Sea of the West and the curious depiction of what would ultimately become the Aleutian Islands, shown as a massive peninsula extending towards Kamchatka and Japan.
The Northwest passage has not yet been discovered, Buache provides significant conjecture as to its possible location. Over the course of the next 15 years, the Northwest Coast of America would be completely re-drawn, beginning with the discoveries of Captain James Cook in the region.
The map is quite rare. We could not locate any examples at auction or in dealer catalogs in more than 30 years.