Wilmer C. Sadler

C. W. Cryer

C. W. Cryer worked for the Midwest Piping and Supply Company.

J. E. Sampson

J. E. Sampson worked for the United States Engineer District Office.

E. P. H. Willette

Hugh M. Barton

Hugh Barton was a research assistant at the Metallurgical Laboratory in Chicago during the Manhattan Project.