In 60-61 C.E., while Paul was in prison in Rome, he sent a number of letters that are now part of the Holy Scriptures. In the one to the Colossians, he wrote: “Aristarchus my fellow captive sends you his greetings, and so does Mark the cousin of Barnabas, (concerning whom you received commands to welcome him if ever he comes to you)

Col. 4:10,

What a turnaround! From being the object of Paul’s intense displeasure, Mark was again a valued coworker. Evidently, Paul had informed the Colossians that a visit from Mark was possible. If it materialized, Mark would be acting as Paul’s representative.