By these records, from Mr Hessels' translation of which the above quotations are taken, two things at least are made clear. First, that Gutenberg was in possession of the knowledge of an art unknown to his companions, which he was desirous of keeping to himself, and which those not in the secret wished to learn; and secondly, that a press containing some important and mysterious “pieces,” which was not to be exhibited to outsiders until the pieces had been separated, played a prominent part in this secret work. The “looking-glasses,” apparently, were imaginary, and intended for the misleading of too curious enquirers. But it has been ingeniously suggested that the word spiegel, or looking-glass, was a cryptic reference to the Spiegel onser Behoudenisse, or Mirror of Salvation, and that Gutenberg and his assistants were engaged in preparing the printed Speculum for sale at the forthcoming fair held on the occasion of the pilgrimages to Aix-la-Chapelle in 1439. This part of his plan, however, was frustrated by the postponement of the fair for a year.

It is hardly to be doubted that the researches privately conducted in the deserted convent of St Arbogastus, where Gutenberg dwelt, concerned the great invention usually linked with his name. Were this probability an absolute certainty, then Strasburg might successfully dispute with Mentz the title of birthplace of the art of printing. But to what stage Gutenberg carried his labours in the old convent, or how far he proceeded towards the goal of his ambition, is not known, though it has been conjectured that possibly he and those in his confidence got as far as the making of matrices for types, and that perhaps even the types used for the earliest extant specimens of type-printing were cast there, although not used until Gutenberg had returned to Mentz. On the other hand, there are many who think that matrices and punches are due to the ingenuity of Peter Schoeffer, to whom reference is made below.

When Gutenberg left Strasburg for Mentz is not known, but he was in the latter city in 1448, as is testified by a deed relating to a loan which he had raised. His constant pecuniary difficulties resulted in his entering into partnership, in 1450, with the goldsmith Johann Fust, or Faust, a rich burgher of Mentz, who contributed large loans towards the working expenses, and was evidently to share in the profits of the press. Fust or Faust, the printer of Mentz, has sometimes been identified with the Faust of German legend. The dealings in the black art related of the one have also been ascribed to the other by various story-tellers, some of whom say that in Paris Faust the printer narrowly escaped being burnt as a wizard for selling books which looked like manuscripts, and yet were not manuscripts. The first printed letters, it should be observed, were exactly copied from the manuscript letters then in vogue.

The first really definite recorded event in the history of Gutenberg's printing was a lawsuit brought against him by Fust, in 1455, when Gutenberg had to give an account of the receipts and expenditure relating to his work, and to hand over to Fust all his apparatus in discharge of his debt. The partnership was of course dissolved, Gutenberg left Mentz, and Fust continued the printing assisted by Peter Schoeffer. Schoeffer was a servant of Fust's, who had further associated himself with the establishment by marrying Fust's daughter, and to him some attribute the improvement of the methods then employed by devising matrices and punches for casting metal types. It has even been suggested that this device of his, communicated to Fust, induced the latter to rid himself of Gutenberg by demanding repayment of his advances when Gutenberg was unable to meet the call, and that having gained possession of his partner's apparatus, he was able, with the help of Schoeffer and his inventions, to carry on the work to his own profit and glory. But it is difficult to know whether to look upon Fust as a grasping and treacherous money-lender, or as a prudent and enterprising man of business. However this may be, at the time of the lawsuit the work of years was already perfected, printing with moveable types was now an accomplished thing, and the great Mazarin Bible, if not finished, was at any rate on the point of completion.

The earliest extant specimens of printing from types, however, are assigned to the year 1454. These are some Letters of Indulgence issued by Pope Nicholas V. to the supporters of the King of Cyprus in his war with the Turks. They consist of single sheets of vellum, printed on one side only, and measuring c. 11 x 7 inches. They fall into two classes, of each of which there were various issues; that is to say, (1) those containing thirty lines, and (2) those containing thirty-one lines. The thirty-line Indulgence is printed partly in the type used for the Mazarin Bible. The thirty-one-line Indulgence is partly printed in type which is the same as that used for books printed by Albrecht Pfister at Bamberg, and for a Bible which disputes with the Mazarin Bible the position of the first printed book. Who printed these Indulgences is not certainly known. Both emanated from the Mentz press, and it is not unreasonable to believe that both were executed by Gutenberg, since the Mazarin Bible is most probably his work, and since the types used by Pfister were perhaps at one time possessed by Gutenberg. Still, the point is not clear, and the more general view is that they were the work of two different printers. Some attribute the thirty-line Indulgence to Schoeffer, on the ground that some of its initial letters are reproduced in an Indulgence of 1489 known to be of Schoeffer's workmanship. Yet there seems no reason why Schoeffer in 1489 should not have made use of Gutenberg's types—indeed, it is very probable that he had every chance of doing so, as may be seen from the above account of the dissolution of partnership between Gutenberg and Fust.

TYPE OF THE MENTZ INDULGENCE (30-line, exact size).

Those who assign the thirty-line specimen to Schoeffer consider the thirty-one-line specimen to be Gutenberg's work. “And though we have no proof of this,” says Mr E. Gordon Duff, who holds this view, “or indeed of Gutenberg's having printed any book at all, there is a strong weight of circumstantial evidence in his favour.” It may be taken for granted, then, although proof is wanting, that Gutenberg printed at least one of these Indulgences, and perhaps both. In any case, these are the first productions of the printing-press to which a definite date can be assigned. Some of them have a printed date, and in other copies the date has been inserted in manuscript. The earliest specimens of each class belong to the year 1454.

The next production of the Mentz press, as is generally believed, is the beautiful volume known as the Gutenberg Bible, or the Mazarin Bible, because it was a copy in the library of Cardinal Mazarin which first attracted attention and led bibliographers to enquire into its history. It illustrates a most remarkable fact—that is, the extraordinary degree of perfection to which the art of printing attained all but simultaneously with its birth. Even though we cannot tell how long Gutenberg experimented before producing this book, it is none the less amazing that as a specimen of typographic art the Mazarin Bible has never been excelled even by the cleverest printers and the most modern and elaborate apparatus. It was probably not begun before 1450, the year when Gutenberg and Fust joined forces, and was completed certainly not later than 1456. This latter date is fixed by a colophon written in the second volume of the copy in the Bibliothèque Nationale at Paris, which informs us that “this book was illuminated, bound, and perfected by Heinrich Cremer, vicar of the collegiate church of St Stephen in Mentz, on the Feast of the Assumption of the Blessed Virgin, in the year of our Lord 1456. Thanks be to God. Hallelujah.” A similar note is affixed to the first volume.