The history of the first printers in this town is very interesting, for they entered into various partnerships, and the documents relating to these have been preserved and published,[22] throwing a good deal of light on some of the customs and methods of the early printers. In 1476 was printed at Milan the _Grammar_ of Constantine Lascaris, the first book printed in Greek; and in 1481, a Greek version of the _Psalms_, the first portion of the Bible printed in this language. [22] Saxius, _Bibliothecá scriptorum Mediolanensium_. Milan, 1745. Fol. At Florence, Bernard Cennini, the celebrated goldsmith and assistant of Ghiberti, printed, with the assistance of two of his sons, an edition of the Commentary of Servius on Virgil. It was begun towards the end of 1471, and not finished till October 1472, but is the first book printed at Florence. This is the only book known to have been printed by Cennini; but it is not unlikely that in his capacity of goldsmith he did work for other printers in cutting type. The most interesting press at Florence in the fifteenth century, was that founded in the Monastery of St. James of Ripoli by Dominic de Pistoia, the head of the establishment. Beginning with a _Donatus_, of which every copy has disappeared, it was carried on briskly up till the time of his death in 1484, issuing, according to Hain, just over fifty works; according to De Rossi, nearly one hundred. The account books connected with this press have been preserved, and from them we can learn the price of the various articles used by the printers, such as paper, ink, type-metal. Several kinds of paper are mentioned, and identified, as a rule, by their watermarks. We have paper from Fabriano with the mark of a crossbow, a different paper from the same place marked with a cross, and two sorts of paper from Pescia marked with spectacles and a glove. There are several celebrated books printed at Florence before 1500 which cannot be passed over. In 1477 was issued the _Monte Santo di Dio_, said to contain the first copperplate engraving; and in 1481, the celebrated _Dante_, with engravings by Baccio Baldini after the designs of Botticelli. Most copies of this book contain only a few of the plates, while about eight copies are known with the full number. Some celebrated Greek books also were issued at Florence, notably in 1488 the first edition of _Homer_ printed by Demetrius Chalcondylas at the expense of two brothers, Bernardus and Nerius Nerlii. There is a copy of this book in the British Museum, which was bought by Mr. Barnard, librarian to George III., for seven shillings. One complete copy on vellum is known, in the library of St. Mark’s at Venice.