Brief Description: Administrative files of the Ethnographic Committee: outlines of plans for the committee; correspondence of the committee with individual collectors; printed questionnaires on Jewish legends, Purim, Passover, Lag B'Omer, Shavuoth, children's folklore, as well as questionnaires on exaggerations and lies. Minutes of joint meetings of YIVO and the An-Ski Society, 1930. Folklore materials: folk plays, Purim plays, Yiddish and Hebrew folk songs, handwritten folktales, jokes, anecdotes, legends. Linguistic material such as notes on Yiddish grammar, Yiddish pronunciation. *S. An-Ski Jewish Historical-Ethnographic Society* Records include letters of Simon Dubnow and other correspondence of the Jewish Historical and Ethnographic Society in St. Petersburg. Minutes, reports, financial records of the Jewish Ethnographic Expedition in the name of Baron Horace Gunzburg, 1912, 1913, 1916. Minutes and correspondence of the Society of Friends of Jewish Antiquity. By-laws and minutes of the S. An-Ski Society, 1925-1938. Reports to Polish authorities about the work of the society. Membership notebook, financial accounts. List of donors and objects donated to the Museum, 1939. Materials relating to the An-Ski Museum, Vilna, 1913-1941, including administrative correspondence. Materials relating to the An-Ski estate, including correspondence regarding An-Ski's will. Correspondence with: individuals and organizations in Poland, Germany, the U.S.; Jewish Community Council of Vilna; German military authorities in Vilna, 1916-1918. Correspondence with various folklore institutes: Gesamtarchiv der Deutschen Juden, Berlin, 1930: Peabody Museum of Archeology and Ethnology; Harvard University; Biblioteka Narodowa (National Library), Warsaw, 1931. Correspondence with various other libraries, cultural institutes, schools, newspapers. Folklore materials: stories, songs, lecture notes. *The Jewish Bureau of the Byelorussian Academy of Science in Minsk* Songs, tales, anecdotes, proverbs, and other folklore materials. Page proofs of Moishe Beregovski's unpublished *Yidish folklor lider*, Volume II, 1938.