The content of this codex, which accord its script is datable to the twelfth century, reflects a quite common choice for the medicine books of the time: the Ars parva (or Microtegni, from Τέχνη ἰατρική) on ff. 1r-14v, followed by the Liber diaetarum universalium by Isaac Judaeus in Costantinus Africanus’ translation (ff. 15r-61r), that is the to say the master’s work, though in its brief version with the guiding principles for a doctor, and the practical part about diets, a sort of encyclopaedia on all what deals with the man’s health. Nothing is known about the codex history before the fifteenth century, or before it got into Guarnerio d’Artegna’s library. The circumstance that it is not recorded in the inventory written by Guarnerio himself in 1456, but only in the one of 1461 (item 127) makes believe that it got onto his bookshelves in that period of time, maybe from an on-sale book collection, like the one of the cardinal Antonio Pancera the humanist widely purchased from. Another go-between could be doctor Geremia Simeoni who lent Guarnerio some of his works that were later copied in two codices of the Friulian humanist (ms. 43 and 44).