In 1254 Gerard had published without permission a work, Introductorius in Evangelium æternum (An Introduction to the Eternal Gospel) that was judged heretical within a year. Thereupon the General Chapter of Narbonne promulgated their decree, identical with the "constitutio gravis in contrarium" Bacon speaks of. The prohibition was rescinded in Roger's favor unexpectedly in 1266.

Bonaventure was instrumental in procuring the election of Pope Gregory X, who rewarded him with the title of Cardinal Bishop