[143] Posts for the conveyance of intelligence were established by Augustus (see Suetonius, _Aug._, 49). Gibbon, in the second chapter of his _History_, has much information on this point. The reader curious in such matters will find a learned account of the Roman postal service in Godefroy's _Commentary on the Theodosian Code_, vol. ii., p. 526, where he traces the system down from Augustus to the year 400 A.D. It was somewhat similar to that which now prevails in Russia. An interesting story is told concerning Constantine the Great, which illustrates the system. During the Diocletian persecution Constantine, whose leanings towards Christianity were suspected, was residing in Asia Minor with the Emperor Galerius, the determined enemy of Christianity. Constantine knew that there was a plot against him, so, having obtained the authority necessary to use the post, he fled secretly one night, and as he rode along took fresh horses, and at the same time brought the tired animals with him. When his enemies followed him next day, they found the post stables empty, and their prey escaped without any possibility of pursuit. See _Dict. Christ. Biog._, vol. i., p. 526, Art. Constantinus I., and De Broglie, _L'Église et L'Empire_, vol. i., p. 192.
Now let us look at the circumstances under which that foundation was laid. To understand them we must go back upon the course of history. Philippi was a city built by King Philip, the father of Alexander the Great. After the conquest of Macedonia by the Romans, it became famous as the scene of the great battle between Brutus and Cassius on the one hand, and Mark Antony and Augustus on the other, which decided the fate of the empire and influenced the course of the world's history as few other battles have done. At the time of St. Paul's visit the memory of that battle was fresh, and the outward and visible signs thereof were to be seen on every side, as indeed some of them are still to be seen, the triumphal arches, for instance, erected in memory of the victory and the mound or rampart of earth raised by Brutus to hinder the advance of the opposing forces.[144] But these things had for the holy travellers a very slight interest, as their hearts were set upon a mightier conflict and a nobler war far than any ever before waged upon earth's surface. There is no mention made in the sacred narrative of the memories connected with the place, and yet St. Luke, as an honest writer setting down facts of which he had formed an important part, lets slip some expressions which involve and throw us back upon the history of the place for an explanation, showing how impossible it is to grasp the full force and meaning of the sacred writers unless we strive to read the Bible with the eyes of the people who lived at the time and for whom it was written. St. Luke calls Philippi "a city of Macedonia, the first of the district, a colony." Now this means that in that time it was situated in the Roman province of Macedonia, that it was either the capital of the division of Macedonia, in which it was situated, Macedonia being subdivided into four distinct divisions which were kept perfectly separate, or else that it was the first city the traveller met upon entering Macedonia from Asia, and further that it was a Roman colony, and thus possessed peculiar privileges. When we read in the Bible of colonies we must not understand the word in our modern sense. Colonies were then simply transcripts of the original city whence they had come. Roman colonies were miniatures or copies of Rome itself transplanted into the provinces, and ruling as such amid the conquered races where they were placed. They served a twofold purpose. They acted as garrisons to restrain the turbulence of the neighbouring tribes; and if we study Roman geography carefully we shall find that they were always placed in neighbourhoods where their military importance is plainly manifest; and further still, they were used as convenient places to locate the veteran soldiers of Italy who had served their time, where they were rewarded with grants of land, and were utilising at the same time the skill and experience in military matters which they had gained, for the general benefit of the State.