At least ... it seems like yesterday ...
Actually, though, he announced his retirement in the 100th issue of his fanzine, The Comic Reader. The Comic Reader started out called On the Drawing Board, which, at the time I started subscribing as soon as I read a mention of it in a DC comic, was being edited by Mark Hanerfeld. But Paul took over in October 1971, and by this issue two years later, dated August-September 1973, he was ready to call it a day.
Here's the cover of his farewell issue (click to view it at a larger size):
And here's the editorial in which Paul announced that due to the fact that his schooling at the New York University College of Business and Public Administration took up two days a week and that he had a chance to work at DC Comics three days a week, he was passing on the reins of the fanzine to others. (Again, click to bring this to a more readable size.)
Paul also mentions in passing that "a comic convention can now attract over six and a half thousand people."
Anyway, I hope it all worked out for Paul. Anyone know whatever happened to the guy?