communities of apostolic foundation. Any church founded by an apostle would prove the point, but best of all one can turn to the glorious church at Rome, founded (Irenaeus believed) by Peter and Paul the apostolic martyrs. At Rome the tradition of catechism is conscientious, and with many Christians coming there from other parts of the Roman Empire the community is subject to external control. So it is impossible to suppose that the authentic tradition is not to be found in this church which enjoys