Premise: Billy Jacques was a rugby union and professional rugby league footballer who played in the 1890s, and 1900s, playing representative level rugby union (RU) for Yorkshire, and at club level for Hull F.C. (Prior to the 1895–96 Northern Rugby Football Union season, Hull F.C. was a rugby union club), and playing club level rugby league (RL) for St. Helens, and Hull F.C.
Hypothesis: he was the most successful rugby player in the 80's