The article is devoted to the history, itinerary and achievements of the First Rus-sian Ethnographic Expedition to Ceylon and India (1914–1918). Based on archival material and rare publications the article gives insight into the history of this, little known, expedition and provides new biographical information about its participants, Gustav Hermann Christian Meerwarth (also known as Alexander Mikhailovich Meerwarth) and Lyudmila Alexandrovna Meerwarth. Their achievements are placed in the context of transnational contacts of the Peter the Great Museum of Anthropology and Ethnography. The authors of the article show the importance of transnational contacts of the Museum of Anthropology and Ethnography for the success of the First Russian Ethnographic Expedition and the development of Russian Indology and ethnography in 1920–1930s