Chris Christensen
Northern Kentucky University
I was teaching at the University of Minnesota; teaching
mathematics. I tried to devise a crypt system … So I
wrote to the Navy … Well, they didn’t need any more
crypt systems, but they did need someone who had
some ability as a analyst, and would I be interested in
taking their crypt course?
Howard Campaigne
J. J. Eachus was a mathematics PhD from the University
of Illinois. At the time of Pearl Harbor he was teaching
at Purdue University-Indianapolis and as sort of a hobby
he took a Navy correspondence course in cryptanalysis.
[Bill Wray and I] took a Navy course in cryptanalysis
which had no connection with the college [Williams
college]. I had to drop it because of heavy
administrative duties but Bill completed it apparently
very successfully. … I assume that the Navy was
interested in recruiting mathematicians. There was no
regular text – merely mimeographed material on
methods of coding and decoding messages –
substitution, transposition, etc., with exercises on each
lesson. I would say there were about 12 lessons.
Donald E. Richmond
April 6, 1982
 Alfred Clifford
(Top, 1)
 Marshall Hall, Jr.
(Middle, 2)
 Andrew Gleason
(Middle, 5)