Fonds consists of materials documenting the life and career of William Rose, and includes correspondence (1905-1967), diaries (1895-1939), drafts of manuscripts, articles, translations, poetry, lecture notes, published materials (including clippings), offprints, and photographs. Among these are several pieces written under his pseudonym Jan Rozycki. The records are arranged in the following series: Correspondence, Published Works, Reports, Notes, Notebooks, Diaries, Manuscripts, Translations, Reviews, Publications About Rose, Works by Others, Rose Family Records, and Photographs.