Charles Ellicott Commentary Acts 19:1

"And it came to pass, that, while Apollos was at Corinth, Paul having passed through the upper country came to Ephesus, and found certain disciples:" — Acts 19:1 (ASV)

Paul having passed through the upper coasts.—This implies a route passing from Galatia and Phrygia through the interior, and coming from there to Ephesus. The “coast,” in the modern sense of the term, Saint Paul did not even approach.