Charles E. Colahan, in "Officers of the Line." Journal of the Executive Proceedings of the Senate of the United States of America: Fifty-Sixth Congress, Vol. 32, December 6, 1900, p. 575. Washington, D.C.: U.S. Senate and Government Printing Office, 1909.
"Commander Charles E. Colahan" (obituary). The United Service: A Monthly Review of Naval and Military Affairs, Vol. V, Third Series, p. 516. New York, New York: L.R. Hamersly, Jr., 1904.
