An Account of a Geographical and Astronomical Expedition to the Northern Parts of Russia…. Performed By command of Her Imperial Majesty Catherine the Second, Empress of All the Russias, by Commodore Joseph Billings, In the Years 1785,&c. to 1794.

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p. 1: …the Admiralty confirmed the officers chosen by the commander, and supplied astronomical and nautical instruments, the charts and journals of all former navigators from the year 1724, and every other article considered as necessary.