Clifford H. Matthews Jr.

Joanna Brumfiel

Joanna Brumfiel was a stenographer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Charles Maier

Charles Maier was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

R. F. Cullinan

Charles D. Berry

Berry worked in the United States Engineer District Office.