Gutenberg's real name was Gansfleisch, Gutenberg being an addition to his mother's surname[18] which he assumed for reasons not known to us. He was born about 1400, and just when he attained manhood his family, which belonged to the patrician party at Mainz, was banished and sought refuge at Strassburg. At Strassburg Gutenberg remained till about 1446, and legal and municipal records, so far as we can trust to their authenticity, offer us some tantalizing glimpses of his career there. When the town clerk of Strassburg came to Mainz the exile caused him to be arrested for a debt due to his family, and the matter had to be arranged to avoid a quarrel between the two cities. On the other hand, Gutenberg was himself called to account for unpaid duties on wine, and was sued for a breach of promise of marriage. In 1437 he was the defendant in a much more interesting trial. He had admitted two partners to work an invention with him, and on one of these partners dying his brother claimed, unsuccessfully, to take his place in the partnership. The use of the words "presse," "forme," and "trucken" in connection with this invention leaves it hardly open to doubt that it was concerned with some kind of printing, and loans which Gutenberg negotiated in 1441 and 1442 were presumably raised for the development of this. About the middle of the decade he returned to Mainz and there also borrowed money, presumably again for the same object. At this point we are confronted with five fragmentary pieces of printing, all but one of them only recently discovered. The latest of these, according to German bibliographers, is a fragment of an astronomical Calendar in German verse for an unspecified year, which might be 1429, 1448, or 1467, but does not exactly fit any of them; the earliest is part of a leaf of a _Sibyllenbuch_ (originally known as _Das Weltgericht_, because the text of this fragment deals with the Last Judgment). Between these two are placed fragments of three editions of _Donatus, De octo partibus orationis_, two found recently in copies of an edition of Herolt's _Sermones de tempore et sanctis_ printed at Strassburg[19] by Martin Flach in 1488 and now at Berlin, the third one of the minor treasures of the Bibliotheque Nationale at Paris, where it has lain for over a century. Granting that the Calendar was printed for use in 1448 (it has been argued, on the other hand, that its mention of movable festivals was intended to be only approximate), and that the other four pieces can be proved by typographical evidence to have preceded it, we may suppose the _Sibyllenbuch_ to have been printed by Gutenberg shortly after his return to Mainz, i.e. about 1445, or shortly before this at Strassburg.