The Library of Congress has begun putting thousands of photos on the Flickr website (tags). There are currently about 120 baseball shots, mostly from the early 1910s.
Here are two players from the 1912 World Series:
Red Sox pitcher Smoky Joe Wood
New York Giants outfielder Fred Snodgrass
Snodgrass was forever blamed for the Giants losing the eight-game series to Boston (Game 2 was a tie).
Wood pitched complete game victories in Games 1 and 4. He was shelled after only one inning in Game 7, then came out of the bullpen to get the win in Game 8.