K. L. Mallory

J. L. Hartman

J. L. Hartman worked for the J.A. Jones Construction Company.

E. E. Swensson

W.G. Chmielewski

W. G. Chmielewski was a carpenter at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

William H. Jones

William Jones worked for the Fercleve Corporation.