Corpus of Electronic Texts Edition
An Irish Version of Gualterus de Dosibus (Author: Walter de Agilon/Galterius Agilinus)

paragraph 55

Uiola, i.e. blossom of the violet: cold and moist in the first degree. It purges choler from the stomach, liver, and intestines, for it has moistening, lubricous, cooling, and laxative effect. For that reason should it be made into a syrup; it relieves inflammation of the liver greatly. This syrup is suitable, also, for severe cough, as it soothes the chest, allays pain and febrility of the body in general and of the head in particular. For that reason it is suitable for headache caused from choler, or from sanguine humor.