Prejevalsky, or Prjevalskt, Nicholas (1839 -88), the Russian traveller, served in the army for several years. In 1871-73 he travelled from Pekin to the upper waters of the Yang-tse-Kiang. In 1877 he made the first attempt to enter Lhassa, and in 1879 had penetrated within 150 miles of the place when stopped by the authorities of Thibet. He subsequently explored the upper course of the Hoang-ho. Two more attempts were made, but Prjevalsky died at Karakol in western Turkestan.