From The Art and Popular Culture Encyclopedia
Nigel de Longchamps is the author of the Speculum stultorum (A Mirror of Fools), 12th c., a satire of monks and universities society in general. The poem was immensely popular for centuries. Under the title "Daun Burnel the Asse" it is quoted by Chaucer in line 15328 of the "Nun's Priest's Tale."
The hero is Burnellus, or Brunellus, a foolish ass, who goes in search of a means of lengthening his tail. Brunellus first visits Salernum to obtain drugs for this purpose. However, he loses these when attacked by a Cistercian monk with dogs. He then goes to Paris to study, but makes no progress there, being unable to remember the city's name after eight years of study. He then decides to join a religious order, but instead founds a new one by taking the easiest parts from the rules of other orders. Finally, his master recaptures him.