Vintage circa 1912 original from-the-camera negative depicts legendary hurler Christy Mathewson in mid-windup.
Classic 5x7" shot shows the right-hander in warmups, hands above head with left leg extended in a high kick, showing the form that accounted for an astounding 12 consecutive 20-win seasons. Negative comes from the archive of Brown Brothers, one the the first ever photo aggregation services.