"The Base Ball Player's Book of Reference," by Henry Chadwick, 1867

This is considered baseball's first official rule book. Author Henry Chadwick was a sports journalist and leading promoter of the game. This is a greatly expanded version of the original 1866 book, both published by J. C. Haney & Company. It was used by the 24 clubs who competed in the 1867 World's Tournament of Base Ball, held in Detroit.