410 The Period of Constitution Making fruit. Edward III., under the pressure of the new war with France, showed, in 1340, his intention to levy a generally increased custom on wool and hides, similar to the maltote of his grandfather. Parliament, to prevent the arbitrary action, made a regular grant of the custom to be in force for a specified time, and containing a pro- vision that after the expiration of that time no custom, beyond the ancient custom, that is, the one established in 1275, should again be levied. This was almost im- mediately followed by a statute which contained a broader prohibitive provision. Referring especially to a large subsidy granted at the same time that the increased tariff had been arranged, it stated that the people should not be from henceforth charged nor grieved to make common aid or to sustain charge, if it be not by the common assent of the prelates, earls, barons, and other great men, and com- mons of our said realm of England, and that in the Parlia- ment.1 This was a reassertion, after nearly half a century of intermittent conflict, of the principle of 1297, and the added clause respecting Parliament is very significant. That Parliament was strong enough to gain this acknowl- ^ edgment from Edward III. indicates that the victory was practically won, the principle of parliamentary con- trol of taxation established. Scarcely ever after was it called in question; the energy and ingenuity of kings was expended rather in dodging it. The date 1340 is, there- fore, a most important one in the growth of Parliament's power. An act of 1362, confirmed in 1371, to the effect that no one, without the consent of Parliament, could negotiate any charge upon wool, seems to have brought to an end the private dealings with merchants.2 How- 1 A. and S., document 59. v 3 For a specific instance of resistance to such dealings, 1343, see A, and ^ S., document 65. The Ordinance of the Staples, 1353, shows something of the "merchants strangers'7 and of the rate of the customs duties in that year; ibid., document 74.