Peter of Alexandria Canonical Epistle Let them recall to their minds also how Peter, the chief of the apostles, "was thrown into prison, and delivered to four quaternions of soldiers to keep him; "[52] Polycrates of Ephesus It is surely noteworthy that nobody doubted that it was kept by a Christian and Apostolic ordinance. So St. Paul argues from its Christian observance, in his rebuke of the Corinthians.[4]