Note 3 at Ac 20:15: Chios is a large island in the Aegean Sea off the coast of what was then called Asia (see note 3 at Ac 16:6). It was south of Lesbos and Mitylene (see note 2 at Ac 20:14) and separated from the mainland of Asia by a narrow channel, only five miles wide at places. The island is about thirty miles long, north to south, and eight to eighteen miles wide.

Chios was reputed to be the home of the poet Homer. Those who lived on Chios were supposed to be the richest of the Greeks in the fifth century B.C.

Note 4 at Ac 20:15: Samos is an island in the Aegean Sea off the west coast of Asia Minor (N.T. Asia, see note 3 at Ac 16:6), twenty-seven miles long by eight miles wide. It is separated from the mainland by a narrow strait of only one mile.

Note 5 at Ac 20:15: Trogyllium was located on the mainland of Asia Minor (N.T. Asia, see note 3 at Ac 16:6) at the narrow strait separating the mainland from the island of Samos (see note 4 at this verse), about twenty miles southwest of Ephesus (see note 3 at Ac 18:19). Paul spent the night there at the end of his third missionary journey as he traveled toward Jerusalem. According to Smith's Bible Dictionary, there was an anchorage near there called St. Paul's Port.

Note 6 at Ac 20:15: Miletus was a city on the coast of Asia Minor (N.T. Asia, see note 3 at Ac 16:6) about thirty-six miles south of Ephesus. Paul came to Miletus toward the end of his third missionary journey and summoned the elders from the church at Ephesus (see note 3 at Ac 18:19) to Miletus to exhort them and tell them good-bye (Ac 20:17-38). Paul also left Trophimus (see note 7 at Ac 20:4) at Miletus (Miletum, 2Ti 4:20) because he was sick.