L. J. Lamb

Karl W. Conrad

Fredrick “Fred” D. Johnson

Fredrick “Fred” D. Johnson was a research assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

William J. Ayerst

Ayerst worked in the United States Engineer District Office.

J. C. Watkins

J. C. Watkins worked for the United States Engineer District Office.