John C. Delmar, Jr.

Emmons B. Brown

Brown worked in the United States Engineer District Office.

Ennis C. Peters

Ennis Peters was a staff worker at Los Alamos during the Manhattan Project.

W. H. Delaney, Jr.

James Downey

James Downey was a laboratory helper at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.