Since posting this website, I’ve received invaluable assistance from a reader whose handle is Caipora. Much gratitude to him for bringing his prodigious search skills to bear on this topic. I would also like to note that since October of 2022 one of his research projects has been to find published historical documentation of nude male swimming events and programs with a view to discovering if females were permitted to witness boys and men swimming nude. His findings are posted under the topic YMCA/Nude Swim Classes at
https://forums.delphiforums.com/yellowfever3/messages?msg=2137.1
I also wish to acknowledge a great contribution by Richard P., the originator of the site that I linked as Historical Resource 2. He has been active finding originals of altered photos as well as attributions of those photos.
And then there is Mark McC whose voluminous contributions have included new photos as well as discovering original versions of images and identifying their sources.
Much thanks to all.