National Museum of Nuclear Science & History
Jas Purcell worked for the Roane-Anderson Company.
Brickhouse worked at Los Alamos during the Manhattan Project.
John H. Williams (1908-1966) was a Canadian-American physicist. Williams transferred to Los Alamos in early 1943 and was among the first group of scientists to arrive on the Hill.
J. J. Haynie worked for the J.A. Jones Construction Company.