When apprentices or companions wished to become masters, they were called _aspirants_, and were subjected to successive examinations. They were particularly required to prove their ability by executing what was termed a _chef-d'oeuvre_, which consisted in fabricating a perfect specimen of whatever craft they practised. The execution of the _chef-d'oeuvre_ gave rise to many technical formalities, which were at times most frivolous. The aspirant in certain cases had to pass a technical examination, as, for instance, the barber in forging and polishing lancets; the wool-weaver in making and adjusting the different parts of his loom; and during the period of executing the _chef-d'oeuvre,_ which often extended over several months, the aspirant was deprived of all communication with his fellows. He had to work at the office of the association, which was called the _bureau_, under the eyes of the jurors or syndics, who, often after an angry debate, issued their judgment upon the merits of the work and the capability of the workman (Figs. 243 and 244). [Illustration: Fig. 244.--Carpenter's Apprentice working at a Trial-piece.--From one of the Stalls called _Miséricordes_, in Rouen Cathedral (Fifteenth Century).] On his admission the aspirant had first to take again the oath of allegiance to the King before the provost or civil deputy, although he had already done so on commencing his apprenticeship. He then had to pay a duty or fee, which was divided between the sovereign or lord and the brotherhood, from which fee the sons of masters always obtained a considerable abatement. Often, too, the husbands of the daughters of masters were exempted from paying the duties. A few masters, such as the goldsmiths and the cloth-workers, had besides to pay a sum of money by way of guarantee, which remained in the funds of the craft as long as they carried on the trade. After these forms had been complied with, the masters acquired the exclusive privilege of freely exercising their profession. There were, however, certain exceptions to this rule, for a king on his coronation, a prince or princess of the royal blood at the time of his or her marriage, and, in certain towns, the bishop on his installation, had the right of creating one or more masters in each trade, and these received their licence without going through any of the usual formalities. [Illustration: Fig. 245.--Staircase of the Office of the Goldsmiths of Rouen (Fifteenth Century). The Shield which the Lion holds with his Paw shows the Arms of the Goldsmiths of Rouen. (Present Condition).]