[142] Both Lewin and Conybeare and Howson in their _Lives of St. Paul_ enter into great details about the scenery and other circumstances of St. Paul's voyage from Troas to Neapolis, which would be out of place in this commentary, even if space did allow their insertion. Mr. Lewin's account is specially interesting, as he gives the impressions made upon himself when going over the ground. These writers all point out that St. Paul must have travelled with a fair wind; Conybeare and Howson even try to determine its exact direction, which they maintain was from the southward. Otherwise he could not have made the passage in two days, or followed the course actually taken. On a subsequent occasion (Acts xx. 6) St. Paul took five days in sailing from Philippi to Troas. [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.