They arrived at the port of Perga. From there, major roads led to the interior of the land beyond the Taurus Mountains.
At this point, John Mark left the team for unknown reasons (see study note on 15:36–41). He might have been unhappy that the gospel was advancing into non-Jewish lands. Perhaps he missed his home or was unable to continue the challenging journey. Whatever the reasons, he returned to the familiar and comfortable Jewish area of Jerusalem.