Law Courts 179 reign that the Exchequer was distinctly a common-law court; it was slow to lose its higher, essentially equitable, jurisdiction. The Common Pleas was much more the creation of a definite time and ordinance and bore marks of inferiority to the other two.z To begin with each had its proper business; the King's Bench, the pleas of the crown, including all breaches of the king's peace; the Common Pleas, the ordinary civil actions; the Exchequer, matters touching the royal revenue. This is but a rough statement; really the spheres of the King's Bench and Common Pleas overlapped, and this facilitated the practice of stealing work from the Common Pleas which was begun by the King's Bench and adopted by the Ex- chequer, for more business meant more money. In the end it came about that while each court had some work all its own, each could entertain any of the common civil actions.2 2. The Displacement of the Old Local Courts by a New Local System of Royal Courts.—The immediate ef- fects of the Norman Conquest upon the old local courts, _ * For a useful diagram illustrating these and other developments of the king's court, see G. B. Adams, The Descendants of the Curia Regis, Amer- ican Historical Review, xiii, 11-15. But see also his The Origin of the English Courts of Common Law, Yale Law Journal, xxx., 798-813. 2 Maitland, Justice and Police, p. 35. The differentiation of the King's Bench from what might, at the end of the thirteenth century, be termed the king's council (see below, pp. 296, 297, and note i) was very gradual. "For ordinary purposes" the King's Bench consisted "of a few pro- fessional judges, . . . but at any moment this court can be afforced by the presence of the king, of his councillors, of numerous barons and prelates"; in either form this was the old coram rege court. But in the reign of Edward I., can be noted the beginning of the final complete separa- tion of the King's Bench, a limited court of professional judges, from a larger and vaguer king's court or what stood for that at this later date. But when that separation had taken place and the old court had brought forth its third judicial offspring, we find that neither in its smaller nor its larger form, neither as Council nor as House of Lords, had that body divested itself of all its judicial power. And the judicial power which remained was of a higher order than that which it had transmitted. "A court which is to stand above the king's bench is being evolved out of the old court held coram rege."—Maitland, Introduction to Memoranda de Parliament, pp. bnoL-lxxxi., passim. See also below, pp. 208, 209. The passing of the chief justiciar, 1268, (ibid., p. 216, note 3) marked progress in the separation of judiciary and executive. Prom that time each of the central, common-law courts had its Chief Justice—in the case of the Exchequer known as Chief Baron.