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 Baron de Hirsch Fund Records document the organization's involvement in the planning of agricultural communities across the United States and to some extent in South America; the founding and administrative dealings of agricultural and trade schools; the establishment of the Jewish Agricultural Society; and the business records of the Fund itself. In addition, the collection documents the protection offered to immigrants through port work, relief, temporary aid, promotion of suburban industrial enterprises and removal from urban centers through the Industrial Removal Office, land settlement, agricultural training, and trade and general education. In this respect, the collection is of major interest for Jewish genealogists as it documents a number of individual immigrants. In addition, the collection contains documentation on the administration and organization of the fund, documentation on Jewish farming colonies such as the Jewish Agricultural Society, Woodbine Colony and Agricultural School, and documentation on the Baron de Hirsch Trade School. In addition, the collection contains blueprints and photographs of facilities.