4 = Number of missionary journeys recorded in the Bible. This ‘counts’ his trip (which included a shipwreck), as a prisoner of the Romans, to Rome. It does not count his journeys to Spain and/or Macedonia which may have occurred between his two Roman imprisonments.
13 = Number of letters (books of the Bible) he wrote.
- 9 to churches and 4 to persons.
- 4 Journeys and 13 letters: 1/2/3/7. I:1; II:2; III:3; Rome* 7.
- *4/2/1 – 4 prison epistles; 2 during later travels; 1 during second/final imprisonment.
61 = age at death (he was martyred by the Romans)

