Here the _circular hypothesis_ of Beza and Ussher comes to our aid. It is supposed that the letter was destined for a number of Churches in Asia Minor, which Tychicus was directed to visit in the course of the journey which took him to Colossæ.[21] Along with the letters for the Colossians and Philemon, he was entrusted with this more general epistle, intended for the Gentile Christian communities of the neighbouring region at large. During St Paul’s ministry at Ephesus, we are told that “all those that dwell in Asia heard the word of the Lord, both Jews and Greeks” (Acts xix. 10). In so large and populous an area, amongst the Churches founded at this time there were doubtless others beside those of the Lycus valley “which had not seen Paul’s face in the flesh,” some about which the apostle had less precise knowledge than he had of these through Epaphras and Onesimus, but for whom he was no less desirous that their “hearts should be comforted, and brought into all the wealth of the full assurance of the understanding in the knowledge of the mystery of God” (Col. ii. 1, 2). To which or how many of the Asian Churches Tychicus would be able to communicate the letter was, presumably, uncertain when it was written at Rome; and the designation was left open. Its conveyance by Tychicus (vi. 21, 22) supplied the only limit to its distribution. Proconsular Asia was the richest and most peaceful province of the Empire, so populous that it was called “the province of five hundred cities.” Ephesus was only the largest of many flourishing commercial and manufacturing towns.