The present volume extends from the year 1471 to the year 1484, corresponding to the pontificate of Sixtus IV, and comprises the contents, so far as they come within the scope of this Calendar, of the Vatican and Lateran Registers of that Pope. Also included is a summary of some fragments, brought to light in 1926, from a lost Lateran Register of Eugenius IV.
The Calendar was compiled many years ago by the late Mr. J. A. Twemlow, M.A., Professor Emeritus and sometime Reader of Palaeography at Liverpool University. The Index of Persons and Places is the work of the late Mr. S. C. Ratcliff, I.S.O., M.A., a former Assistant Keeper of the Public Records; and the Index of Subjects has been compiled recently by the Reverend Urban Flanagan, O.P., Lecturer in History at the University College, Cork.
The continuation of this Calendar has now been made possible by the co-operation of the Irish Manuscripts Commission who have made themselves responsible for the provision of Father Flanagan as the editor of future volumes in this series.
PUBLIC RECORD OFFICE,
D. L. EVANS.