Eugène Christophe was a French road bicycle racer and pioneer of cyclo-cross. He was a professional from 1904 until 1926. In 1919 he became the first rider to wear the yellow jersey of the Tour de France. In the yellow jersey at the 1912 Tour de France after stages 3–5 — 3 stages, July 4 to July 9, taking it from Odile Defraye. Wiki link