Medieval manuscripts in British Libraries II: Abbotsford to Keele.
P. 52: Bangor, Cathedral, Liber pontificalis Aniani episcopi (s. XIV), no. 36, f. 166: "Letter of Anianus, b. of Bangor, giving ten days' relaxation of penance to all who pray at Clare OESA for the soul of Richard Cristenhale. Dated at Clare, 25 Apr. 1279".