Oxford Franciscans compiled, on the basis of on-site surveys, the Registrum Anglie de libris doctorum et auctorum ueterum — a manuscript union catalogue of some 1400 manuscript books in England, Scotland and Wales. It listed the works of 98 authors owned by 189 monastic or cathedral libraries.
"Although none of these libraries is Franciscan, the master list is organized geographically according to the division of Great Britain into the custodiae of the Franciscan order. The three surviving manuscripts of the Registrum date from the beginning of the fifteenth century; it is nevertheless possible to establish from external evidence that the Registrum must date from the first or second decade of the fourteenth century" (Rouse & Rouse, Authentic Witnesses. Approaches to Medieval Texts and Manuscripts  237-38).
Registrum Anglie de libris doctorum et auctorum veterum. Edited with an introduction and notes by Richard H. Rouse and Mary A. Rouse. The Latin text established by R. A. B. Mynors (1991).