The papers consist of chapter drafts of Fallen Leaves written by Cornelius Osgood. The additional material consist of photographs taken by Cornelius Osgood during his career as an ethnologist.
Chiefly correspondence, memoranda, a notebook, and memorabilia relating to Vanderbilt's service as an officer in the U.S. Engineers during World War I. Also included are technical notebooks on mathematics, chemistry, and engineering (1897-1926). Of particular note are two illustrated manuscript volumes: one by Joseph Lyddell Peyton outlining a course of instruction for British naval officers, and the second by John Burnell showing the headlands of various coastlines in Europe and Africa. Also in the papers are checkbooks, guestbooks, a nurse's record of Vanderbilt's case of typhoid fever (1902-1903), and inventories of the Vanderbilt library in New York City, and of his yacht.