In his new book, writer Robert McCrum charts the history of his great-grandfather who devised a football rule that exists to this day Mohamed Salah (right) scores a penalty for Liverpool FC One of the most important rules in football was created by a man from Co Armagh — and his great-grandson’s latest book secures his relative’s place in sporting history. Robert McCrum’s The Penalty Kick details the life of William McCrum from Milford, who, in 1890, to curb so much foul play in a sport that he adored, proposed the new sanction..