1. The specific phenomenon of "hours" of prayer is discussed in several works on
illuminated books, probably most thoroughly in John Harthan, The Book of Hours (New
York, 1977).
2. Paul Saenger, Catalogue of Manuscripts in the Newberry Library (Chicago:
University of Chicago Press; in press).
3. Harthan, op. cit., p. 9; Robert G. Calkins, Illuminated Books of the Middle
Ages (Ithaca, N.Y., 1983), p. 243.
4. Saenger, op. cit., MS 84.
5. Saenger, op. cit., MS 86.
6. Saenger, ibid.
page 151
7. See, for example, Erwin Panofsky, Early Netherlandish Painting, vol. I
(Cambridge, Mass., 1953), p. 27.
8. Bibliotheque National MS lat. 10553.
9. Bibliotheque National MS lat 13286.
10. G. Grassi, The Visconti Hours (Turin, 1972).
11. The Serristori Hours, London L1722-1921; Hours of Alfonso of Aragon, Salting
Collection No. 1224.
12. Harthan, op. cit., p. 9.
