Gutenberg’s name stands on no title-page and is connected with no colophon. The fact, however, that the full responsibility for the invention belongs to him is borne witness to by his contemporaries, Peter Schöffer, Ulrich Zell, the Abbot Trithemius, Jacob Wimpheling, and others. In a chronicle of the archbishop of Mayence, continued to the year 1555 and compiled by Count Wilhelm von Zimmern, it is recorded that the noble art of book-printing was discovered in Mayence by a worthy citizen named Gutenberg, who devoted to the invention all his time and resources until he had brought it to a successful completion. In 1470, a letter was written by the scholar, Wilhelm Fichet, of Paris, to the historian, Robert Gaguin, which letter was later printed on the last sheet of a volume published in Paris and in Basel, entitled: _Gasparini Pergamensis Orthographiæ Liber_. This letter contains an enthusiastic description of the new art of book-printing discovered in Germany by Gutenberg. The writer says: “There has been discovered in Germany a wonderful new method for the production of books, and those who have mastered this method are taking their invention from Mayence out into the world somewhat as the old Grecian warriors took their weapons from the belly of the Trojan horse. The light of this wonderful discovery will spread from Germany to all parts of the earth. I have been told by three foreigners--Kranz, Freiburger, and Gering--that Gutenberg has succeeded in producing books by means of metal letters in place of using the handiwork of the scribes.” Fichet goes on to speak of Gutenberg as “bringing more blessings upon the world than were given by the goddess Ceres, for Ceres could bestow only material food, while through Gutenberg the productions of the thinkers could be brought within the reach of all people.” This letter was written only two years after the death of Gutenberg, and as it came from Basel, one of the first cities to which the new art had been carried from Mayence, it constitutes very good contemporary evidence as to the immediate credit that was given to Gutenberg for the invention.[428] The historical date now given for the completion of the invention is August 22, 1450. On this date Gutenberg entered into a contract with Johann Fust, a wealthy citizen and goldsmith of Mayence, under which contract Fust loaned to Gutenberg, with interest at 6 per cent. (a low rate for that period), the sum of 800 gulden in gold. This sum Gutenberg agreed to utilise in developing his invention, while the material of the workshop to be instituted was pledged to Fust as security for the repayment of the loan. The sum proved insufficient for establishing the necessary plant, and two years later Fust added a further sum of 800 gulden.