The paper publishes letters from Baron R.F. von Ungern-Sternberg, well-known general of the White forces in Russian Civil war and national liberation movement of Mongols in the beginning of the twentieth century, to Officer P.P. Malinovsky. These letters contain interesting data regarding Pan-Mongolian plans in 1918, i.e. before the Pan-Mongolian Movement had started in Transbaikalia. The movement was assisted by Ataman G.M. Semenov. Ungern s letters contain information on the plans of unification of Mongolian people in the Inner and Outer Mongolia, their integration with Buryat-Mongols, as well as with the Kyrgyz (=Kazakh), Manchus and Tibetans. They also bring to light the plans of consolidation of Semenov s forces in Transbaikalia. The paper shows all known data on Malinovsky ’s biography as well as publishes copies of recently discovered originals ofJürgen von UNGERN-STERNBERG - Professor, Doctor of Philosophy, Doctor of Sciences (in History), Fachbereich Alte Geschichte, Universität Basel, Switzerland, j.vonungern-at-unibas.ch. Ungern ’s two letters. The authors also publish a brief telegram related to contacts between R.F. Ungern and P.P. Malinovsky.