Magna Carta the King in the charters. In addition, medieval cases referred to the clauses in Magna Carta which dealt with specific issues such as wardship and dower, debt collection, and keeping rivers free for navigation. Even in the 13th century, some clauses of Magna Carta rarely appeared in legal cases, either because the issues concerned were no longer relevant, or because Magna Carta had been superseded by more relevant legislation. By 1350 half the clauses of Magna Carta were no longer actively used. During the reign of King Edward III six measures, later known as the "Six Statutes", were passed between
Magna Carta King without Parliament. This supremacy would be challenged by the likes of Granville Sharp. Sharp regarded Magna Carta as a fundamental part of the constitution, and maintained that it would be treason to repeal any part of it. He also held that the Charter prohibited slavery. Sir William Blackstone published a critical edition of the 1215 Charter in 1759, and gave it the numbering system still used today. In 1763, Member of Parliament John Wilkes was arrested for writing an inflammatory pamphlet, "No. 45, 23 April 1763"; he cited Magna Carta continually. Lord Camden denounced the treatment of Wilkes as