teaching. First, the external evidence: Several of the post-apostolic church fathers tell us, in their extant writings, that after Peter had preached for some time in Rome, his auditors requested that Mark, Peter’s “interpreter” (scribe, secretary), record the content of Peter’s preaching in Rome that they might have a permanent record of Peter’s sermons, which sermons contained his eye-witnessed accounts of the public ministry of Christ. These church fathers further tell us that Mark, in fulfillment