SUMMARY: In 1149 or 1150 Guerricus of Igny and the archbishop of Reims Samson of Mauvoisin
put Hugo of Fouilloy up for prior of St Denis of Reims. But Hugo refused the election,
and adduced reasons for his refusal in an apologetic letter addressed to an unidentified domno
H. The letter is transmitted by eight manuscripts, and two of them have been written in Hugo’s
lifetime, probably under his supervision. In all these MSS the letter is copied beside Hugo’s
De claustro animae. A new argument is given for a datation of De claustro, book I and II,
ante 1149. A critical edition of the letter is provided and its style and sources are investigated.
A list of hitherto unknown MS witnesses of the De claustro animae is given at the end.