The annual expenditure accounts recorded in this register provide a complete picture of a Cluniac monastery during its last 60 years. A medium-sized house containing about 15 monks, Thetford Priory was well-endowed and under the patronage of the Howard Dukes of Norfolk. This register was probably compiled to help regulate expenditure at a time of financial strain. The accounts provide important evidence for many aspects of monastic and outside life, including liturgy, obits and corrodies, the provisioning of the household, farming, taxation, legal disputes and entertainments.