Acts 19:10 - Ellicott's Commentary On The Whole Bible

So that all they which dwelt in Asia heard the word of the Lord Jesus, both Jews and Greeks. — Here also there is a gap which can only be partially filled up by inference or conjecture. Ephesus, probably, came to be the centre of St. Paul’s activity, from which journeys were made to neighbouring cities; and hence we may legitimately think of the other six churches of Revelation 2:3 as owing their origin to him. The growth of the new community among both sections of the population became a conspicuous fact, and began to tell upon the number of pilgrims who brought their offerings to the shrine of Artemis, or carried away memorials from it.