Among unpublished sources, the most valuable have been various collections in the Public Record Office, especially the Patent, Close, and Liberate Rolls; the Registers of Congregation (Reg. A a, G 6, H 7, I 8), the records of the Chancellor’s Court (Acta Curiae Cancellarii ~D~, ~F~, EEE, or ~B~), and Brian Twyne’s collections, in the Oxford University Archives. Further, I have had occasion to consult the Oxford City Archives, some of the old registers of wills at Somerset House, and various manuscripts in the British Museum, Lambeth Palace, and Gray’s Inn; the Bodleian and several College libraries at Oxford; the University (or Public) Library and several College libraries at Cambridge; the library of Sir Thomas Phillipps at Thirlestaine House, Cheltenham; the National Library at Paris, and the Municipal Library at Assisi. I have had no opportunity of examining the episcopal registers of the diocese of Lincoln, extracts from which, however, are contained in Twyne’s transcripts.
The Index, so far as it deals with the names of persons and places, will, I hope, be found complete, with the following limitations. The authorities quoted, either in the text or in the notes, the places where the manuscripts cited were written, or were formerly or are now kept, or where the editions referred to were printed, are not mentioned in the Index, unless there is some particular reason for including them. So far as it deals with subjects, the Index is meant to be supplementary to the Table of Contents. The writings of the friars are not classified in the Index, except those which come under the headings _Aristotle_, _Bible_, _Evangelical Poverty_ and _Sentences_.
Finally, I wish to express my thanks to those who have given me aid, namely, to the Rev. W. G. D. Fletcher, Vicar of St. Michael’s, Shrewsbury, author of ‘The Black Friars in Oxford,’ who generously placed a valuable collection of references at my disposal; to Mr. Falconer Madan for assistance and advice; to the Keeper of the University Archives and the Town Clerk of Oxford for allowing me free and repeated access to the documents under their respective charges; and to the authorities in the various offices and libraries in which I have worked, for their unfailing courtesy.