Fascinating pair of maps based upon the works of Kaempfer and Buache, illustrating two mid-18th Century projections of the NW Coast of America and NE Coast of Asia prior to Cook's first voyage. Buache's map is based largely upon Russian Sources derived from De L'Isle in Russia. Kaempfer's information was derived during his time in Asia. Many interesting and diameterically opposed cartographical myths are shown, including the Sea of the West, NW passage, various water routes across North America and unusual projections of Japan and the NE Coast of Asia. One of 10 maps in Diderot's treatise, which were generally focused on this region.