Posted By:
RichardBill,
This post may be a bit long-winded, so I apologize in advance. However, here is what I've dug up.
1. Baseball card images. According to http://www.oldjudge.com/auction/256/ and http://www.caramel-cards.com/e105.html, the E105 and T216 images are identical to the E92/E101 image. According to http://www.cardpricer.com/priceguide/player/william-a-ohara/19674, there were 9 Bill O'Hara cards released during his playing days. Of those 9, there are 4 images: T204/M116, E92/E101/E105/T216, T206(s), C46. Assuming everything post 1983 matches the T206 image, that leaves the 1972 Classic Cards pose, a card that I forgot I even owned. To round out the baseball card images, here it is (cropped to show only the image):
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2. Non-card images. Per my earlier post, I am posting an image of the 1912 Toronto team that has the players labeled (written on the picture). While going through the book, I also found other images that show/name O'Hara.
In order (all with Toronto), 1912 Team Photo, 1926 as team secretary, 1928 as manager:

3. Last, but not least, statistics. I searched baseball-reference.com, the online SABR minor league database (incredible resource!) and MLB.com's historical player search to try and find another O'Hara. I didn't find any other O'Hara that has played for Toronto, nor did I find another that played for the Giants, but all three listed an additional two O'Hara's with major league experience during the time that the Horner photos were being shot:
Kid O'Hara was active in 1904 with Boston
Tom O'Hara was active in 1906 and 1907 with St. Louis.
Both players were also outfielders. I suppose there is a chance the T204 image is one of them -- but that would mean that not only was the player misidentified, but so was the team. I have no idea what the odds of that happening are.
Anyway, that about rounds out my efforts thus far.
Anybody have any photos of Kid or Tom O'Hara?
Regards,
Richard.