 During the 15th century, the common law courts were challenged by the civil law and equity found in the Chancery and similar courts. These courts and legal methods were much faster than the common law courts, so lawyers and claimants flocked to them. This was perceived as a threat to the common law courts, for good reason; between 1460 and 1540, the business of the common law courts significantly dropped, while the Chancery's cases rose massively in number. In reaction to this, the Court of King's Bench developed its own, faster system, intent on winning cases back, and through procedures such as the Writ of Quominus and Bill of Middlesex acquired a wider jurisdiction. While this succeeded in forming an equilibrium between the old common law courts and the new courts, it was viewed with suspicion by the Common Pleas, who became highly reactionary to the changes the King's Bench attempted to introduce. When the King's Bench attempted to use the Bill of Middlesex to widen its jurisdiction, the Common Pleas became increasingly conservative in its attempts to avoid ceding cases. This was limited by the fact that the three Common Pleas prothonotaries could not agree on how to cut costs, leaving the court both expensive and of limited malleability while the King's Bench became faster, cheaper and more varied in its jurisdiction.
