Cataloguing the charters
The first serious attempt to use the charter evidence towards writing a history of the abbey was made by Morris Charles Jones in a series of articles in the early volumes of Montgomery Collections. Although valuable in bringing together for the first time documentary information concerning the abbey's history, Jones's work unfortunately suffers from the fact that he had no access to most of the original charters and was forced to rely on late transcripts and English translations. It was only after the main groups of original charters had been deposited in the National Library of Wales that they became available to scholars.
The historian and palaeographer J. Conway Davies made a calendar of the combined groups of charters from various repositories, which he published to accompany a paper on the abbey's records delivered by him to a meeting of the Powysland Club. Unfortunately, because his transcripts of Welsh personal and place-names are so riddled with errors, the value of the calendar is greatly diminished.