Was it supposed to be Boston-Montreal-Boston? I did a ride a few years ago with Rusa #4 and he was telling me the backstory about how RUSA came about and how some officials from ACP came over to observe the then only qualifier for P-B-P.They had split from Jim Konski as he had been unresponsive. Rides had been run from near Syracuse/Homer area in NY.
https://rusa.org/newsletter/05-05-03.html