I forgot to mention the most amazing thing--as I was nearing the north side of the park, I saw an elderly fellow of indeterminate ethnicity carrying a most handsome Russian Blue-type cat over his shoulder!
I saw this fellow and cat once before, the fellow was trudging up the bottom of Harlem Hill and the cat was yowling. You definitely hear that cat before you see it, it was the same thing today, and all the little kids walking by were delighted and mesmerized!
It wears a harness, and it holds onto the fellow's shoulders and back rather as a monkey would...
I have a strong suspicion that they must take a daily constitutional together. It would be appealing if more people took their cats for walks. I hope I see them again soon!