See the following files:
Owst's Manuscripts. This contains an index of the manuscripts cited by Owst in his two fundamental studies of preaching in medieval England.
Malcolm Parkes - Manuscripts Cited. This contains an index of the manuscripts cited by Malcolm Parkes in his chapter on book provisions in J. I. Catto and Ralph Evans (eds.), The History of the University of Oxford. Vol. 2: Late Medieval Oxford (Oxford, 1992), pp. 407-83.
Ps.-Bernard, Meditationes piissimae. Scanned from a 19th-century edition.
Publilius Syrus, Sententiae, scanned from the edition by E. Woelfflin.