Sadakichi Hartmann (1867-1944) was a writer, poet, dramatist, and critic during the early 20th century. Hartmann was an important figure in early modernism and had a diverse social circle that included Walt Whitman, Ezra Pound, and John Barrymore. This collection includes Hartmann's published works, unpublished manuscripts, correspondence, photographs, pastels, paintings, and diaries.

The collection consists of materials related to Jane C. Weaver's research on the life and work of Sadakichi Hartmann. Materials in the collection include research notes, photographs, and photocopies of original correspondence and documents related to Hartmann.