Any ideas where these old team photos came from?

[aquarius31]

Actually several of the team photos have been trimmed and removed directly from the Palmer's Athletic Sports in America, England and Australia book. The color plate is on page 373 and is titled "The Chicago and All-American Teams Ready for Play at Villa Borghese, Rome." I also see the Baltimore, Indianapolis and Louisville team photos in the same book and each have the blank backs.

I don't know about the origin of the other items although it is likely that they also came from a late 19th or early 20th century book. It's too bad that someone would have cut these out of larger items. Many of the full page color and b/w illustrations in these books have blank backs.

I do not believe that any of the non-Palmer photos are actual supplements from period newspapers including the Temple Cup composite. If they were a supplement, they would typically include the newspaper source and possibly a serial # (below scans are small but both show the source of NY recorder and a portion of the serial #). Additionally, supplement paper tends to be slightly thicker. You can see that this ebay auction has no source indicator and it looks similar to the one you've posted except for the missing white borders in your post.