Anselm, Saint, Archbishop of Canterbury. [Letter to Gunhilda, royal nun, 1094] in Sancti Anselmi Cantuariensis Archiepiscopi Opera Omnia 4.46-50

[Letter from Saint Anselm, archbishop of Canterbury to Gunhilda/Gunnilda, royal nun]
Archbishop Anselm tries to persuade her with reminders of the vanity of the flesh, the deaths of her parents and of Alan Rufus. He suggests that God killed Alan because of the intended marriage, and might do the same to Alan Niger, and if he does not, she and he will be damned. He strongly criticizes the values implied in her excuse that she left because she had been denied a promised abbacy. Anselm also mentions a letter Gunhilda sent him which is not extant.
Online at Epistolae (See also Bibliographia record).