In his business as a stone polisher, we learn, from his own declarations, that several years previous to 1436, he had taught that art to one Andrew Dritzehen. Subsequently, “a long time afterwards,” he engaged in the manufacture of looking-glasses, along with Johan Riffe, the prefect or mayor of Lichtenow. Andrew Dritzehen, learning this, requested Gutenberg to teach him that art as well; and a similar request was at the same time made on behalf of Andrew Heilman, by his brother Anthonie. Upon their entering into an agreement, whereby they bound themselves to pay him certain premiums for so doing, Gutenberg complied with their requests. But one year, after making preparations for attending the fair held at the time of the pilgrimages to the shrines at Aix-la-Chapelle, the journey was suddenly put off until the year following, owing to the postponement of the fair. Deprived of the opportunity of increasing their gains, the two Andrews, with enforced unprofitable leisure upon their hands, made an unexpected visit to St. Arbogaste, where they found Gutenberg busily engaged upon matters, the secret of which he seemed determined to keep to himself. After much importunity, however, he consented to reveal to them, upon certain conditions, “all the wonderful and secret arts that he knew, without any exception.” The conditions were, that they on the one side, and he and Riffe on the other, should cancel the existing agreement, and enter into a new one; that they should conjointly pay to him the sum of 250 florins, making, with 160 previously paid for being taught the art of making looking-glasses, 410 in all; that 100 was to be paid immediately, and the remainder at stated periods; and that their share of the profits was to be one-third, the remaining two-thirds being divided between Gutenberg and Riffe. It was further agreed, that the partnership for carrying on “_the wonderful art_,” should be for a term of five years; but that if any one of the partners died before the expiration of that period, the survivors should, at its expiration, pay to the representatives of the deceased the sum of one hundred florins, retaining in their own hands “_all the utensils and implements of the art, and all works perfected by the instruments_.”