Jamieson, Fausset and Brown on Acts 16:11-13

11-12. Therefore loosing from Troas, we came--literally, "ran."

with a straight course--that is, "ran before the wind."

to Samothracia--a lofty island on the Thracian coast, north from Troas, with an inclination westward. The wind must have set in strong from the south or south-southeast to bring them there so soon, as the current is strong in the opposite direction, and they afterwards took five days to what they now did in two (Ac 20:6) [Howson].

next day to Neapolis--on the Macedonian, or rather Thracian, coast, about sixty-five miles from Samothracia, and ten from Philippi, of which it is the harbor.