This codex seems to have been prepared, according to the usual university practice, for hire, as on the sixteenth page there is noted the memorandum, “this quaternio has five sheets.” In 1247, Nicolaus is recorded as being the _stationarius universitatis_, and in the same year a certain Johannes Cambii is recorded as a _stationarius librorum_; and Minghinus as a _stationarius peciarum_. Here we have in one year record of three classes of scribes being at work. They were all noted as being doctors of the law, and they all appear on the list of persons exempt from military service. Later in the same century, a certain Cervotti, who had inherited from a deceased brother a collection of books, undertook to use these for profit by offering them for hire. The list of the books, drawn up by the notary Noscimpax, has been preserved, and includes twenty different works. Certain of these are collections of the university lectures in the Faculty of law, and the others have also, in the main, to do with the subject of jurisprudence. The first book on the list is _Diversitates Dominorum_, and the last _Margarita Gallacerti_, which latter does not appear properly to belong to the subject of jurisprudence. In the year 1400, there is reference to a scribe named Moses and specified as a Jew, which, in view of the university regulations previously referred to prohibiting the sale of books by Jews or to Jews, is noteworthy. The entry appears at the close of a manuscript of Bartholomæus Brixiensis: _Emi hunc librum anno domini MCCCC die XXI. Mensis novembris a Moysi Judeo pro viii. florenes._ Kirchhoff is of opinion that Moses must have been a travelling pedlar, as it is difficult to believe that a Jew could have at that time secured the post of a licensed university scribe.[347] In Verona, there is reference to a certain Bonaventura, who is recorded as a _scriptor_, and who seems to have occasionally utilised for his manuscript work the hand of a woman. An inscription on one of the manuscripts by Bonaventura, quoted by Endlicher, reads as follows: _Dextra scriptoris careat gravitate doloris. Detur pro penna scriptori pulchra puella._[348] In Florence, the earliest _librarius_ of note was probably Johannes Aretinus, whose work continued during the years between 1375-1417. Ambrosius Camaldulensis, who had so much to do with books and with literature, takes pains, in a letter written in 1391, to send a cordial greeting to the _librarius_ Aretinus.[349] Bandini prints a letter of Petrarch’s in which the latter refers to Aretinus as a friend for whom he has a high regard and as a man of exceptional knowledge and clearness of insight, and specifies, as works that he valued highly, nine manuscripts which had been written by the hand of Aretinus. These included Aristotle’s treatise on Ethics, several Essays of Cicero, the Histories of Livy, Cicero’s Orations, Barbari on Marriage, etc.