it was described by brian ó cuív as one of the "most important and most beautiful ... undoubtedly the most magnificent" of the surviving medieval irish manuscripts. pádraig ó riain states ".. a rich, as yet largely unworked, source of information on the concerns of the community at glendalough in or about the year 1131, and a magnificent witness, as yet barely interrogated, to the high standard of scholarship attained by this monastic centre."