After 1456, under the enactment of the congregation of the university, each manuscript dealer and paper dealer was called upon to pay to the Rector of the university at the time of his acceptance and license a _scutum_ of gold. The four _taxatores_, the officials charged with the supervision of the fees for the booksellers’ guild (usually the four senior or most important members of the guild), were also charged with the selection or approval of new members and with the supervision of the proper carrying out of the various regulations controlling the organisations of the guild. In the earlier period of the work, such censorship as was found necessary concerning the books to be published was exercised through these four taxators. They were also the official representative body of the university guild. In case any member of the guild suffered injury from unauthorised competition, the guild had the power to suspend the business operation with the person charged with committing the injury, until the complaint could be passed upon. In case the rules of the corporation had been broken, the corporation appears to have had the power, at least up to the beginning of the fifteenth century, of withdrawing the trade privilege or license. The taxators or _principales jurati_, as they were sometimes called, had power to proceed not only to supervise the business undertaking of the members of the guild, but were also authorised to take measures against the outside or unlicensed booksellers and to proceed, if necessary, even to the point of seizure and confiscation of their goods. In carrying out such measures, they were empowered to call upon the university bedels for co-operation. These unlicensed dealers or book pedlars, as they increased in numbers, naturally attempted to withdraw themselves from the jurisdiction and supervision of the university authorities. An ordinance of Charles VI., dated June 20, 1411, confirms specifically the right of control over the entire book-trade, and prohibits pedlars, dealers, hucksters, etc., from taking part in the selling of manuscripts, “of which business they could have no understanding.” The edict went on to specify that the carrying on of the book business by ignorant and irresponsible dealers not only caused injury to the licensed book-dealers, but was a wrong upon the public, in that it furthered the circulation of incorrect, incomplete, and fraudulent manuscripts. This ordinance was doubtless issued at the instance of the book-dealers’ guild, but it is evident that it was not strictly carried out, as from year to year there are renewed complaints of the competition of these ignorant and irresponsible book pedlars.