Clephane, Walter C. (1918). "Lewis Clephane: A Pioneer Washington Republican". Records of the Columbia Historical Society, Washington, D.C. 21: 263–277. JSTOR40067107.
Clark, Allen C. (1925). "Abraham Lincoln in the National Capital". Records of the Columbia Historical Society, Washington, D.C. 27: 1–174. JSTOR40067199.
Glover, Charles C. (1960). "A Brief History of the Metropolitan Club". Records of the Columbia Historical Society, Washington, D.C. 60/62: 266–277. JSTOR40067230.
newspapers.com
"The Impeachment Trial". Spirit Of Jefferson at Newspapers.com. April 7, 1868. Retrieved 22 July 2022 – via Newspapers.com.