Margam Abbey was founded by the lord of Glamorgan, Earl Robert of Gloucester, in 1147. Its scriptorium was concerned not only with the usual business of a monastic house, but also provided staff for the central administration of the Gloucester earldom in the twelfth century and served as the earldom's writing-office for Glamorgan in the early thirteenth. Professor Patterson traces the organization and development of Margam's secretarial administration...