English: the first of the Epistles to the Colossians (Photo credit: Wikipedia)
The Book of Acts mentions a Mark, or John Mark, a kinsman of Barnabas (Col 4:10). The house of his mother Mary was a meeting place for Christians in Jerusalem (Acts 12:12). When Paul and Barnabas, who had been in Antioch, came to Jerusalem, they brought Mark back to Antioch with them (12:25), and he accompanied them on their first missionary journey (13:5), but left them prematurely and returned to Jerusalem (13:13). When Paul and Barnabas were about to set out on a second missionary journey, Barnabas proposed to take Mark, but Paul thought him unreliable, so that eventually Barnabas made one journey taking Mark, and Paul another journey taking Silas (15:36-40). Mark is not mentioned again in Acts. However, it appears that he became more reliable, for Paul mentions him as a trusted assistant in Colossians 4:10 and again in 2 Timothy 4:11. Tradition has it that after the death of Peter, Mark left Rome and went to preach in Alexandria, Egypt, where he was eventually martyred.