An Account of a Geographical and Astronomical Expedition to the Northern Parts of Russia, for Ascertaining the Degrees of Latitude and Longitude of the Mouth of the River Kovima (sic); of the Whole Coast of the Tshutski, to East Cape; and of the Islands in the Eastern Ocean, Stretching to the American Coast, performed, by Command of the Imperial Majesty Catherine the Second, Empress of all the Russias, by Commodore Joseph Billings, in the Years 1785 to 1794. The Whole Narrated from the Original Papers by Martin Sauer, Secretary of the Expediton