Owing to a destructive fire at Nicomedia, Pliny suggests the formation of a volunteer fire-brigade, limited to 150 members.
Claudius established here, as at Ostia, a cohort of vigiles as a fire-brigade.
The rest of the province is policed by the South African constabulary, a body 3700 strong, to which is also entrusted customs preventive work, fire brigade work and such like functions.
Both police and fire brigade are under the command of a single Keishi-sokan (inspector-general).
The emperor is afraid that the fire-brigade might become a "political club," and cautiously contents himself with approving the provision of a fire-engine (34) Trajan's fear of factions and clubs in these two last cases has sometimes been connected with the question of his attitude towards the Christians in Bithynia.