The _Fourth Edition_ is also in Dutch prose. All known copies of this edition are so badly printed that they have the appearance of spoiled or discarded sheets. Many authors have supposed that this must have been the first edition, and, perhaps, the first experiment with types; but a closer examination proves that the bad printing is owing, not so much to ignorance and to inexperience as to worn types and careless presswork—that this edition is really the last. The copy that is preserved by the city of Haarlem shows, in the handwriting of the sixteenth century, this inscription in Dutch: “The _Speculum Salutis_, the earliest production of Lourens Coster, the inventor of typography, who printed at Haarlem about the year 1440.” Between the second and the third leaf has been inserted a portrait of Lourens Coster, “engraved by Vandervelde after Van Campen,” with the words, in Latin, “Lourens Coster, of Haarlem, first inventor of the typographic art about the year 1440.” Underneath this inscription is a Latin verse by Scriverius, in which he extols Coster as indisputably the inventor of typography. As the writing, the portrait, and the inscription were added a long time after the book had been printed, these additions cannot, consequently, be accepted as evidences of any real value. Junius, the historian of Holland, writing in 1568, was the first to call attention to the _Speculum_. He noticed but one edition: it is not probable that he knew of the others. He said it was made by Coster from types of wood, in Haarlem, [p273] before the year 1440. Scriverius, a Dutch author, writing in 1628, said that it was printed by Coster from founded or cast types in or about 1428. Heineken, a German bibliographer, intimates that the blocks of the _Speculum_ were engraved, and that the two Latin editions were printed in Germany after the invention of typography; but he concedes, rather grudgingly, that the Dutch editions were printed in Holland. Santander says that the book was printed in the Netherlands, but not before the year 1480.