National Museum of Nuclear Science & History
Mathis worked for Stone and Webster Engineering Corporation.
Arthur L. Hughes was an British/Welsh physicist. He worked on the Manhattan Project in St. Louis on the cyclotron and plutonium production and at Los Alamos, NM.
Groft worked at the 300 Area at Hanford during the Manhattan Project.
J. D. Hayes worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Dorothea Lisle was a stenographer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.