The chapters are explicit. Of the two, the sixth is of far greater consequence, both to those seeking in Confirmatio Cartarum a complete statement of the right of Parliament to exercise exclusive control over taxation and to those looking for a vindication of the royal prerogative. The fifth can be taken for what it was, a mere promise on the part of the king not to bring forward past wrongs in defense of future ills,--a promise, the like of which was seldom of much practical avail. The sixth, however, were it not for two clauses saving to the king “the ancient aids and prises, due and accustomed,” and the “custom of wools, skins, and leather granted before,” would have established a tolerably broad basis for the theory that royal control over taxation underwent its legal death in 1297. The facts, however, that the king could still retain his right to levy ancient aids and prises, provided they were what his ancestors were wont to exact; that he could claim unquestioned control over the wool-tax to the extent of half a mark on the sack; and that nothing was said at all about his right to tallage his demesne and the city of London, form a sound backing for the contention that not only was the royal power over taxation not dead, but that it was still vigorous and capable of much future activity. One might rightfully deduce, also, at least in so far as an explicit reading of the text can lead one to conclusions, that within certain circumscribed limits, the royal prerogative would be unquestioned. By implication, however, it is possible to read into Confirmatio Cartarum a different significance than a bald consideration of its contents allows. The mere fact that the nation had taken a stand on the matter of taxation marks the year 1297 as of profound importance; the fact that the stand was not conclusive, that it did not represent the fullest advance possible at the time, is not to be wondered at. Furthermore, the subsequent Parliaments saw to it that the king observed more than the mere letter of the law, notwithstanding Edward’s evident aptitude for only that. The case in this respect was not unlike the observance of the omitted chapters of Magna Carta; though the written form of them had been misunderstood and unappreciated, yet by the natural forces at play between king and Councils, the spirit of them survived. [De tallagio non concedendo] The so-called Statute _De tallagio non concedendo_, if it could be taken at its face value, provided exactly those restraints upon the royal power wherein Confirmatio Cartarum was wanting. It appears in the Chronicle of Walter of Hemingburgh immediately after the French text of Confirmatio Cartarum under the heading “Articuli incerti in Magna Carta,”[185] “No tallage or aid,” it says, “shall be laid or levied by us or our heirs in our realm, without the good will and assent of the archbishops, bishops, earls, barons, knights, burgesses, and other freemen of our realm.”[186]