The codex also gathers the Advices of the Friulian doctor Geremia Simeoni copied by some copyists of Guarnerio’s milieu. De conservanda sanitate (ff. 71r-90v) is conceived according a traditional scheme that starts from the patient’s physical complexion exam, according the theory of humours worked out by Hippocrates and Galen: the four elements or ‘roots’ (water, air, earth, fire), which are the base of all the things existing in nature, correspond with the following four different man’s complexions or temperaments: flegmatic (it is the case of Zaccaria Trevisan, the General Governor (‘luogotente’) of Patria del Friuli the work is dedicated to), melancholic, choleric and sanguine. On the other side, as a remedy against the epidemic plague Friuli had been suffering for years, Geremia drew out his Regimen ad pestilentiam (ff. 137r-146v). Proposed remedies could apparently be considered risible nowadays, but in some cases they had a surely positive effect, as the advice the doctor of Raspano chose for himself in that occasion, «Cito, longe et tarde»: that is to say the infected zone was to be ‘quickly’ left to go then to a sufficiently ‘far’ place so as to come back to his own village as ‘late’ as possible. The text transmission of Geremia’s works is solely owed to the two Guarneriana codices: ms. 43 which is here presented and ms. 44 that in its fourteenth section conveys a Consilium ad ducem Albertum Geremia finished to write in Udine, on 30th October 1444.