[1] He was president of the Albany Exchange Bank and, from 1909 to 1917, served as adjutant-general of the New York National Guard.
[1][2] Williams wrote extensively on the history of the American West, including biographies of the trappers Antoine Robidoux and Bill Williams; United States Senator Philip Schuyler; and frontiersmen John Hoback and John Coulter.
[3] His works on this subject are held at Yale's Beinecke Rare Book and Manuscript Library.
[1] Chauncey Pratt Williams Writings on the American West.
Yale Collection of Western Americana, Beinecke Rare Book and Manuscript Library.