'Exceedingly rare' (Holmes). Issued some seven years after the first edition of the author's Account of the Russian Discoveries between Asia and America (London, 1780), this supplement was intended to be bound in at the end of copies of the first edition. 'The author would have arranged, at a more early period, the following Comparative View, which seems necessarily connected with his former publication on the Russian Discoveries; if he had not been absent from England when Cook's Voyage first made its appearance; and if continued travels and avocations had not prevented him from consulting those books, charts, and manuscripts, which the examination of so intricate a subject required' (advertisement).


First edition. 4to, [iv], vii-[viii], 9-31, [1, blank)] pp., without the first blank leaf, contemporary-style half calf, red morocco gilt label to spine, marbled boards.