James M. Paradis. Strike the Blow for Freedom. The story the 6th U.S. Colored Infantry, raised and trained at Camp William Penn, outside of Philadelphia.
John M. M’Murray, Major, 6th U. S. Colored Troop. Recollections of a Colored Troop, 1916. Republished with new material compiled by Randon W. Bartley and published by M’Murray Publishing Company 1994. Available from the Jefferson County Historic and Genealogical Society http://www.penn.com/~jchgs/museumshop.html