Pliny the Younger (A.D. 62?c.A.D. 113). Letters. The Harvard Classics. 190914.
LXXXII. Trajan to Pliny
THE CIRCUMSTANCES of the city of Byzantium are such, by the great confluence of strangers to it, that I held it incumbent upon me, and consistent with the customs of former reigns, to send thither a legionary centurions guard to preserve the privileges of that state. But if we should distinguish the city of Juliopolis in the same way, it will be introducing a precedent for many others, whose claim to that favour will rise in proportion to their want of strength. I have so much confidence, however, in your administration as to believe you will omit no method of protecting them from injuries. If any persons shall act contrary to the discipline I have enjoined, let them be instantly corrected; or if they happen to be soldiers, and their crimes should be too enormous for immediate chastisement, I would have them sent to their officers, with an account of the particular misdemeanour you shall find they have been guilty of; but if the delinquents should be on their way to Rome, inform me by letter.