Register of Letters (Latin, complete)
This book is in Latin.
The complete Latin Register of Gregory's letters, 844 letters in fourteen books arranged by indiction (590-604), with the two legal appendices of Book XIII: the whole papal chancery of the age, from Sicilian estates to the conversion of the English. The text and numbering are those of the Maurist edition (Migne, PL 77), the numbering Barmby's English selection (the Register of Letters book) also follows; this book adds the roughly 440 letters that selection leaves untranslated.