There was no taxation in the reign of Edward I, except as the clergy taxed the people for the prosecution of the crusade, until Edward called his first Parliament on the 22d April, 1275, at Westminster. The composition of the assemblage is uncertain; the implication of the Chronicler is that it was a Parliament of magnates,[124] but the introductory clause of the Statute of Westminster has it otherwise.[125] “These be the Acts of King Edward ...” it says, “by his council and by the assent of archbishops, bishops, abbots, priors, earls, barons and the community of the realm being thither assembled.” The Statute of Westminster, which was composed of some fifty-one articles, included a provision for regulating the feudal aids which were required upon the knighting of the lord’s son or on the event of the marriage of his daughter. Twenty shillings on the knight’s fee and twenty shillings from each parcel of land held in socage yielding twenty pounds annually, were to be the maximum rates thereafter. [A custom on wool] The great advantages gained by the nation under the Statute of Westminster were not won without a price. The same Parliament made a grant of a custom on wool, woolfells, and leather.[126] The parties to the grant were essentially the same as those who registered their assent in the preamble of the statute; there was, however, this singular difference, that it was done “at the instance and request of the merchants.” The amount levied was “a half-mark from each sack of wool, and a half-mark from each three hundred woolfells, which make a sack, and one mark from each last of leather, exported from the realm of England,” etc.