46 INTRODUCTION. 
The following prudential advice enters too deeply 
into the mysteries of the profession to have been 
designed for the use of the profane: 
De prudentid Medici sumentis pro labore. 
Non didici gratis, nec sagax Musa Hippocratis 
Agris in stratis serviet absque datis. 
Sumpta solet car? multum medicina juvare, 
Si que datur gratis nil habet utilitatis. 
Res dare pro rebus, pro verbis verba solemus. 
Pro vanis verbis montanis utimur herbis, 
Pro caris rebus, pigmentis et speciebus. 
Est medicinalis medicis data regula talis : 
Ut dicatur, da, da, dum profert languidus, ha, ha- 
Da medicis primo medium, medio, nihil imo, 
Dum dolet infirmus medicus sit pignore firmus. 
Instantér quezre nummos, ut pignus, habere. 
Feedus et anti 1 conservat pignus amicum, 
Nam si post queris quzrens semper eris™. 
= In the we he speaks of the medical authors 
: Maurus, Mattheus Salomon, Petrus Urso, moderni 
Sunt medici, per quos regnat medicina Salerni™. 
: Aliter, injuriosus haberis, 
See an account ; j 
hereafter given, of the particular MSS. in the catalogu? 
