Chambers, E. K. _The Mediaeval Stage_, 2 vols., Oxford 1903.
Clark, J. W. _The Care of Books_, Cambridge (new edn.) 1909.
Ker, W. P. _English Literature, Mediaeval_, London 1912. [A good
brief orientation.]
Legouis, E. _Chaucer_ (transl. L. Lailavoix), London 1913.
Rashdall, H. _The Universities of Europe in the Middle Ages_, 2
vols., Oxford 1895.