the Magna Carta and reserved for the Court of King's Bench and Court of Common Pleas, although it later grew back. This process of common law and equity was reversed; during the 16th century the Exchequer was solely a common law body, with the equity jurisdiction only again becoming relevant near the end of the Tudor period. W. H. Bryson argues that this happened during the reign of Edward I. By 1590 the Exchequer's jurisdiction over equity cases was confirmed, and it was handling a significant number a year, including disputes over trusts, mortgages, tithes and copyholds; since taxation was ever-present, it was not difficult to show that the dispute prevented the payment of a debt to the monarch, allowing the Writ of Quominus. The Exchequer stood on an equal footing with the other Westminster courts (the Court of Common Pleas, Court of King's Bench and Court of Chancery), with cases transferred easily from one to another, although there were problems in the case of the Court of King's Bench. The traditional method for moving a case was the writ of supersedeas, but the King's Bench represented the monarch, who could not have writs placed against him. Instead, a clerk would bring the Red Book of the Exchequer to the King's Bench and assert that the case's claimant was an officer of the Exchequer, necessitating his trial there rather than in the King's Bench. The Exchequer maintained a clear rule with the other equity court, the Court of Chancery; a case heard in one could not be re-heard in the other. Apart from that, cases of equity could be heard by either court. The Exchequer had superior status over inferior courts of equity, able to take cases from them and countermand their decisions. The jurisdiction of ecclesiastical courts also overlapped with that of the Exchequer, particularly in relation to the collection of tithes, and there are many records of disputes between the two. As well as appeals to the Exchequer Chamber, the court also allowed appeals to the House of Lords, which was first used in 1660 for the case of Fanshawe v Impey and confirmed in 1677. Officers Treasurer The formal head of the Exchequer for much of its existence was the Lord High Treasurer, who was tasked with collecting royal revenues. Originally a clerk, he was supervised by the Chief Justiciar, and only became head of the court