These two maps provide a detailed view of most of Russia. The first (17.8 x 11") covers from St. Petersburg, Moscow and the Caspian Sea to just beyond the Lena River. The routes of two important explorations are traced on the map; Johann Georg Gmelin's route from St. Petersburg to Yeniseysk 1731-36, and part of the surveys (Moscow to Berezovo) of Joseph-Nicolas Delisle who helped produce the first comprehensive atlas of Russia. The second (12.3 x 8.3") covers the eastern part of Tartary with part of present-day Manchuria and Sakhalin Island. The map was based primarily on Jesuit and English sources and is particularly detailed with regard to the river systems.

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Condition: B+

Both issued folded with wide original margins. There is a bit of minor toning, else very good.