Travels from St. Petersburg in Russia to Diverse Parts of Asia, in Two Volumes, Vol. I- containing a Journey to Ispahan in Persia, in the years 1715, 1716, 1717 and 1718; Part of a journey to Pekin in China, through Siberia, in the years 1719, 1720, and 1721, with a map of the Author's two routes between Mosco and Pekin