Hint (sort of) - the other 4 sport athlete held, at one time, the single season scoring record for Long Island high schools. His record has since been broken by a baseball HOFer.
I imagine that there were many four sport lettermen at small colleges, especially in the 40s and 50s. I am only aware of Hirsch because of the stories my grandfather would tell us about his days playing football for Wisconsin during WW2.