Where had Titus been working while Paul was at Ephesus?

Les explains that Titus was coming from Corinth, where he had been working among the Corinthian believers while Paul was at Ephesus. Paul had missed Titus at Troas, and after a fair amount of time Titus finally made contact with him. Paul was comforted not only by Titus’s arrival but by the consolation Titus brought from the Corinthians. Titus told Paul of their earnest desire, their mourning, and their fervent mind toward Paul. This encouraged Paul amid his pressures, grief, and disappointments, showing that God comforts those who are cast down.