He
started Princeton graduate school in philosophy,
a year after I started in physics, but he, too, soon
switched to math. He was a bit younger than I
and had served a year and a half in the U.S. Army
in Europe after the war, where he had a clerical
position in which he learned to type at incredible
speed, an ability which served him well in his later
book writing.
He had many interests and talents. I think his
undergraduate degree from Caltech was in physics.
He knew a lot of history and he played the piano
brilliantly.