Praefectus Vigilum Urbis Romae.
'Your office, exercised as it is in the City itself, and under the eyes of Patricians and Consuls, is sure to bring you renown if you discharge its duties with diligence. You have full power to catch thieves, though the law reserves the right of punishing them for another official, apparently because it would remember that even these detestable plunderers are yet Roman citizens. Take then for this Indiction the Praefectura Vigilum. You will be the safety of sleepers, the bulwark of houses, the defence of bolts and bars, an unseen scrutineer, a silent judge, one whose right it is to entrap the plotters and whose glory to deceive them. Your occupation is a nightly hunting, most feared when it is not seen. You rob the robbers, and strive to circumvent the men who make a mock at all other citizens. It is only by a sort of sleight of hand that you can throw your nets around robbers; for it is easier to guess the riddles of the Sphinx than to detect the whereabouts of a flying thief. He looks round him on all sides, ready to start off at the sound of an advancing footstep, trembling at the thought of a possible ambush. How can one catch him who, like the wind, tarries never in one place? Go forth, then, under the starry skies; watch diligently with all the birds of night, and as they seek their food in the darkness so do you therein hunt for fame.
'Let there be no corruption, no deeds of darkness which the day need blush for. Do this, and you will have our support in upholding the rightful privileges of yourself and your staff.'