Chester J. Ramatowski

Delavan Halloran

Halloran worked in the United States Engineer District Office.

L. V. Withers

L. V. Withers worked for the Roane-Anderson Company.

R. W. McMahan

Clarence H. Mathews

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