Marshall Hall's Birthday!
Marshall and his wife Sally were much loved members of the Caltech
in an era when their parties might include Richard Feynman, Murray
Frank Borman and a stellar array of other Americans.
Born: September 17, 1910
in St. Louis, Missouri
Died: July 4, 1990
in London, England
especially remembered for his famous Theory of Groups
(1959). During WW II, he joined other mathematicians in
classified work on cracking codes.