I'm not sure how many members here have seen these threads over at Baseball fever, but there are some seriously incredible old photos.
I found them through a google search for Mathewson.
There are a lot of glove shots too!
Warning, these threads will lower your productivity today:
General:
http://www.baseball-fever.com/showthrea ... hoto-Finds.
General:
http://www.baseball-fever.com/showthrea ... hotographs
Grover Cleveland Alexander:
http://www.baseball-fever.com/showthrea ... der-Thread
Christy Mathewson:
http://www.baseball-fever.com/showthrea ... n-s-status