Mansfield also enforced a previous judgement of the Court of King's Bench made in 1645, in which they allowed a special jury of merchants to sit in cases involving commercial law. He built up a special corps of these jurymen, some of whom, such as Edward Vaux, became noted experts on commercial law. "Lord Mansfield's jurymen" acted as an effective liaison between the merchants and the courts. Mansfield was personally a supporter of free trade who was heavily influenced by Roman law and ancient Roman and Greek writers such as Cicero and Xenophon.