Fred A. Wingenfield

E. M. Pownall

E. M. Pownall worked for the Edenfield Electric Company.

C. J. Williams

V. A. Taylor

V. A. Taylor worked for the Roane-Anderson Company.

Clarence H. Mathews

Clarence H. Mathews was a janitor at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.