Protheselaus is a verse romance composed in Anglo-Norman by Hugh of Rhuddlan at the end of the 12th century.
Gilbert died in or just before 1191: that date is a terminus ante quem for the completion of Protheselaus.
With the help of Dardanus and Melander he attempts to conciliate her and travels through distant lands to prove his knightly prowess, then returns and enters her service in disguise.
He travels to Burgundy, defends Ismeine, is made prisoner by the "Maiden of the Isle" (Pucele de l'Isle), finally escapes, recovers his inheritance and marries Medea.
In place of the satire, burlesque and occasional eroticism of Ipomedon the characters in Protheselaus -- especially the hero himself and his friends Dardanus and Melander -- are virtuous, selfless, and motivated by concern for the wellbeing of others.