Leon, patrikios, notarios and anagrapheus of the West was entrusted by the emperor (presumably Isaakios I) with the task of carrying out a census of four (unnamed) themes. At this news, Arsenios, hegoumenos of Iveron, despite his advanced age, took the Iveron chrysobulls and acts of provincial kritai to Thessalonike in order to establish a list of his monasteries' paroikoi. He obtained from Leon a document listing the chrysobulls and rights of his monasteries, confirmed with the krites' signature and seal