Where did Paul and Titus agree to meet, and what ancient city was that place?

Les explains that Titus and Paul had made an agreement to meet in the seaport town of Choas, which was actually the ancient city of Troy. Because they could not drop a note in the mail, send a telegraph, or phone, they had to arrange such meetings in advance. Paul writes that when he came to Choas to preach Christ's gospel, a door was opened unto him of the Lord, but he had no rest in his spirit because he did not find Titus his brother. Les notes that Paul had no way of knowing what had happened to Titus, and he wondered why Titus was not at Choas at the set appointed time. While Paul was distressed, the Lord came on him with something totally different, contrary to what he had thought he was going to do, and Les sees the two as almost a clash in Paul's thinking.