Sources: Early Manuscripts at Oxford University

Early Manuscripts at Oxford University (http://image.ox.ac.uk/), is a source with over 80 early manuscripts now in institutions associated with the University of Oxford. 

Manuscripts hosted in:

• Balliol College
• Bodleian Library
• Corpus Christi College
• Jesus College
• Magdalen College
• Merton College
• St. John's College

were digitized between 1995 and 2000 and published in 2001.
By the original web page you can browse the manuscripts but there isn't a search form, TRAME adds this option with its search form.

You can query the Early Manuscripts db by selecting the voice:

•  Early Manuscripts at Oxford University