A story from Matt Allen:
I was a physics grad student at Stanford 1955-1959. I took the 3 quarter QM course in 1956/7 given by Sid since Leonard Schiff was on Sabbatical that year.
Professors lectured in jackets and ties those days.
Sid entered the room took off his jacket rolled up his shirt sleeves loosened his tie and gave,
next 50 minutes, a clear lecture delivered with great enthusiasm for the subject. He was the best!