Martin Brett is Emeritus Fellow at Robinson College, Cambridge University.

David Smith is formerly of the Borthwick Institute of Historical Research, University of York.

Philippa Hoskin is Archivist at the Borthwick Institute of Historical Research, University of York.

This volume reproduces at full size 190 charters produced for medieval English bishops. Full transcriptions face each plate, with a brief English summary and bibliographical note. Supplementing existing printed editions, the volume illustrates the evolution of script and sealing, and contributes to the history of the written act.