25 See Ignatius, Romans, 4; cf. Clement, Corinthians, 47.

26 For example, see Eusebius, Ecclesiastical HistoryIII: XV-XVI.

27 Ibid., III:XV-XXII.

28 Ibid., IV:XVI.

However, in spite of these early sources, scholarly testimonies and citings of evidence, there are also weaknesses in our usage of these sources. Initially, it is obvious that these writings rely on the New Testament for much of their data, as is specifically reported by Justin.^29 That they do so is certainly not a weakness in itself, for we have argued repeatedly that the New Testament is a good historical source. However, the point is that if they rely on the New Testament, then they are not totally extra-New Testament, and the object of this work is to ascertain what evidence of this latter kind is available.