She continued her studies at the Faculty of Anthropology of the London School of Economics under Charles G. Seligman, and at Somerville College, Oxford under R.R. Marett., graduating from the School of Anthropology in 1912. Marett encouraged her to use her Russian language skills in a review of literature on native tribes in Siberia, which became her book Aboriginal Siberia, published in 1914. In 1914, she became a member of the Royal Anthropological Society, and was also involved with the British Association for the Advancement of Science, presenting research centered around the connection between religion and the environment in Siberia. At this stage she had never visited Siberia, but the quality of her writing led to Aboriginal Siberia becoming the major reference work in its field. Yenisei Expedition Marett had intended the work reported in Czaplicka's Aboriginal Siberia to be the basis for fieldwork in Siberia. In May 1914, she began such fieldwork, partly funded by the Mary Ewart Travelling Scholarship granted by Somerville College, leading a joint expedition of Oxford University and University of Pennsylvania Museum of Archaeology and Anthropology staff. Together with English ornithologist Maud Doria Haviland, English painter Dora Curtis, and Henry Usher Hall of the Museum, she arrived in Russia shortly before World War I broke out. After the war started Czaplicka and Hall decided to continue their expedition while the others decided to go back to the United Kingdom. Czaplicka and Hall (accompanied by Michikha, a Tungus woman) spent the entire winter traveling along the shores of the Yenisei River via the Oryol: more than altogether. Czaplicka prepared several hundreds of photographs of people of Siberia, as well as countless notes on anthropometry and their customs. Czaplicka also received funds from the Committee for Anthropology of the Pitt Rivers Museum in Oxford to collect specimens from Siberia; 193 objects were donated by Czaplicka to the museum's Asian collection. In addition, she collected botanical specimens for the Fielding-Druce Herbarium. It is speculated that recordings of the many languages that they encountered during their expedition were produced on wax cylinders, but this has not been proven and the recordings are not well-known and likely never made it through academic processing if they were brought back to the university. The overall results of the expedition were modest, something that historians have credited to the nature of the study and the many financial and political struggles faced by the