Joseph Newton Hemphill collection 1860-1922 (bulk 1868-1908)
Additional Descriptive Data
The Navy Department Library holds a collection of Joseph N. Hemphill material.
American Biographical Directories. District of Columbia: Concise Biographies of Its Most Prominent and Representative Contemporary Citizens, and Valuable Statistical Data, 1908-1909. Washington, D. C.: The Potomac Press, 1908.
Parker, John P., and Stuart Sprague. His Promised Land: the Autobiography of John P. Parker, Former Slave and Conductor on the Underground Railroad. New York: W.W. Norton, 1996.