Text at bottom on stone:
J.M. Ives, Del. / Entered according to Act of Congress in the year AD.1868, by Currier & Ives in the Clerks Office of the District Court of the United States for the Southern District of New York / Drawn by F.F. Palmer / Across the Continent. / "Westward the Course of Empire Takes Its Way."
- Conningham, Frederic A. Currier and Ives Prints: An Illustrated Check List. New York: Crown Publishers, 1970, p. 4, no. 33.
- Reilly, Bernard F., Jr. Currier & Ives, A Catalogue Raisonné: A Comprehensive Catalogue of the Lithographs of Nathaniel Currier, James Merrit Ives and Charles Currier, including Ephemera Associated with the Firm, 1834-1907, volume 1. Detroit, MI: Gale Research Company, 1984, p. 3, no. 39.