Before leaving Oxford and Cambridge, a word must be said about the individual college libraries. Many of these date from the 15th century when it was the exception rather than the rule for university students to own books. Books were rented from both booksellers and tutors. The college libraries then, as today, did not have enough copies of text-books to go around. The statutes of St. Mary's College, Oxford, dating from 1446, forbade a scholar the continual use of a book in the library for more than one hour or at most two hours, for fear that others wanting the book might be hindered from the use of it. Most of the two score colleges of Oxford and Cambridge have their own libraries, many of them filled to overflowing with precious manuscripts and old authors. While the manuscripts, like those of Corpus Christi, naturally attract scholars from all over the world, the libraries are now comparatively little used by the students of the universities themselves. This is not surprising when it is known that to some of them no books have been added for a century or more. There is no union depository catalog in a central place showing what these libraries contain and very little correlation, although there has been some specialization, as in the dramatic collection at Trinity College, Cambridge, or the modern history at Merton College, Oxford. Several years ago when I visited the Bodleian Library, I was shown around the portion known as "Duke Humphrey's library," and when I admired the old parchment bound volumes in the alcoves my guide remarked sententiously: "These books were on these shelves when the Pilgrims sailed for America." That remark points to an essential difference between many of the old world libraries and those of this country. The museum feature which is so strong in the administration of some of the European libraries is much less prominent in those of the United States.