The centerpiece of my women in baseball collection.
1898 contract between Lizzie Arlington (Stride) and the Atlantic League for Lizzie to play for different teams in the league. It is only documented that she played in one game, although Ed Barrow (who signed her to the contract and whose signature is also on the contract) recalled years later that she played in several games.
What we know for certain is that she pitched a scoreless inning and may have also played second base for The Reading Coal Heavers against the Allentown Peanuts. This made her the first, and to this date the only, woman to play in an affiliated minor league regular season game.
This is the contract that made it happen.