Hours of the Virgin of Chartres, Saint-Père-en-Vallée O.S.B. [1401 to 1500] [1401 to 1500] - Matins - Lesson II - Altior enim celo est de qua loquimur ; abysso profundior, cui laudes dicere conamur | HORAE | Auctor incertus, "Sermo Autberti presbyteri de Assumptione sanctae Mariae" (PL 89, 1277 a) | Lesson | h64