 He praises his teachers Romuald Guarna and Peter Musandinus (in turn the student of Bartholomew of Salerno) in his long poem (four books and 4,663 verses) of ca.1194 on Salernitan drug therapy, "De laudibus et virtutibus compositorum medicaminum".He complains, however, of the school's degeneration after the sack of Salerno in 1194 by Henry VI, Holy Roman Emperor, and in the same poem he criticizes its "granting medical degrees, and consequently a license to lecture, to unlearned and inexperienced youths."