Baseball history abounds in this lot featuring one of the greatest hitters ever to step into a batter's box. Hall of Famer Rogers Hornsby signed this 1939 First Day cover and 1939 stamp, both of which commemorate baseball's centennial. There's also a signed photo of Hornsby from a magazine. "The Rajah" played 23 seasons in the majors and his .358 lifetime batting average ranks second only to the legendary Ty Cobb.