In consideration thereof the archbishop pardoned Ursus.
As a doctor, Ursus wrought cures by some means or other.

He made use of aromatics; he was versed in simples; he made the most of the immense power which lies in a heap of neglected plants, such as the hazel, the catkin, the white alder, the white bryony, the mealy-tree, the traveller's joy, the buckthorn.

He treated phthisis with the sundew; at opportune moments he would use the leaves of the spurge, which plucked at the bottom are a purgative and plucked at the top, an emetic.

He cured sore throat by means of the vegetable excrescence called Jew's ear.

He knew the rush which cures the ox and the mint which cures the horse.