Original correspondence consists of one letter each to Peter Pringsheim (1912); Joseph Koeth (1928); and A. Sommerfeld; as well as six letters to Ernst Stern (1907-1908). A handwritten 1933 letter from Fritz Haber to Chaim Weizmann in Mannern, Switzerland (6 pages) is available as a photocopy only. Also included is a typescript by Hans Schaeffer on Jews in Breslau (photocopy), Die soziale, politische und religioese Stellung der juedischen Familien in Breslau um die Jahrhundertwende 1900. The typescript is part of a letter by Hans Schaeffer to Johannes Jaenicke, also in the collection.

This collection contains the personal and professional papers of William Edlin, editor of The Day and a prominent Socialist. It includes correspondence with individuals and with organizations, newspaper clippings, manuscripts of works by Edlin and by others as well as translations done by Edlin, and some of Edlin’s personal documents. These materials relate to Edlin’s involvement with The Day, with the Socialist Party, the Workmen’s Circle, various labor and Zionist organizations, literary clubs and activities, and with music, art and drama.

The collection represents the papers of Morris David Waldman (1879-1963), a rabbi, social worker and communal leader, who was appointed executive secretary of one of the main Jewish defense organizations, the American Jewish Committee (AJC), in 1928. The executive secretary had top executive function at the organization and was in charge of working out and implementing the organization’s projects and policies regarding monitoring the civil and human rights of the Jews, and intervening on behalf of the Jews both in the U.S. and abroad. In 1942, Waldman was promoted to executive vice-president, a position he held until his retirement in 1945. The Morris Waldman Files relate to all of Waldman's activities as acting executive secretary and vice-president of the AJC.