E. C. Hawley

Arthur “Pete” V. Peterson

Colonel Arthur “Pete” V. Peterson was the Army’s area engineer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

E. W. Vanderbilt

H. P. Graves

H. P. Graves worked in the United States Engineer District Office.

David Hawkins

David Hawkins (1913-2002) was an administrative aide at Los Alamos and the Manhattan Project’s official historian.