This collection documents the experiences of Wilcher (and his friends) while in Civilian Public Service, and after he left CPS and was imprisoned at McNeil Island Federal Prison Camp. Correspondence (one or more letters) may be found to/from Allen Barr, Corbett Bishop, James E. Bristol, Casey Buford, Rex Corfman, Julien Cornell, J. Passmore Elkinton, Roy Finch, Caleb Foote, Paul French, Paul Furnas, Harry Geiger, Philip Isely, Rufus Jones, Thomas E. Jones, Charlie Koethen, Carl Kraus, Henry Maier, Samuel W. Marsh, James P. Mullin, A.J. Muste, John Nason, George Reeves, Crane Rosenbaum, Dr. Clarence P. Shedd, David Stafford, Douglas Steere, David E. Swift, Ian Thiermann, Evan Thomas, Norman Whitney, Agnes Young, and Bob Zigler. Also of significance are a small number of letters written to/from his parents, who were less than pleased with their son's conscientious objection stance.
It is difficult to know why there are letters in this collection that were not written to, from or about Wilcher. It may be that there was a system to "round-robin" correspondence and that some stayed in Wilcher's hands. He and others debated the future and the legality of CPS and of the oversight by the American Friends Service Committee of various CPS camps, as well as the nonviolent witness of men who walked out of CPS to go to prison, and many of the letters express these concerns.