Sinnigen 1957, p. 55: "In the ninth century, the ministry was divided into two departments, one under a symponos or assessor, who supervised the urban guilds, the other under the logothetes tou praitoriou, who may (like the earlier primiscrinius) have been concerned with the administration of justice." Sinnigen, William Gurnee (1957). The Officium of the Urban Prefecture during the Later Roman Empire. Rome: American Academy in Rome.