The last named has shown extremely good reason for thinking that there is an Aramaic source behind the first fifteen chapters of Acts.[9] He is less convincing when he tries to prove that this was a single document, and that it was faithfully translated without addition or change by the editor of Acts. It seems more probable that there was more than one Aramaic source, and that it was often changed and interpolated by the editor. Harnack skilfully tries to distinguish two main lines of tradition, that of Antioch and that of Jerusalem. He also thinks the Jerusalem tradition existed in two forms, which can be distinguished as doublets in Acts i.-v. He attaches Acts xv. to the tradition of Antioch, but it seems more probable that it belongs to the Jerusalem tradition. The truth may be as follows: soon after the time when Barnabas had gone over to the Hellenistic party another body of Christians from Jerusalem came to Antioch. In the years which followed there grew up two traditions of what happened next. The tradition at Antioch was that {65} the Christians from Jerusalem had been chiefly concerned with the physical necessities of their Church, though they were undoubtedly men possessed of a prophetic gift. They had so worked on the sympathy of Antioch that it had accepted the needs of the poor saints in Jerusalem as a responsibility laid on it by heaven. This tradition is preserved in a short form in Acts xi., and in the Epistle to the Galatians Paul energetically sustained its correctness, incidentally mentioning some other events connected with his stay at Jerusalem, the perversion of which, as he maintained, had given rise to the tradition of Jerusalem. This latter tradition the editor of Acts had found preserved in the document which he has used as the basis of Acts xv., and if any one will read Galatians ii. alongside of Acts xv., not in order to see how much they agree or differ, but rather to note how far they might be different accounts of the same series of events, he will see that Paul's chief contention is that he only saw the leaders of the community at Jerusalem in private, and that they at no time succeeded in imposing any regulations on him. The vigour of his protestations seems to indicate that his opponents had maintained that the meeting was an official one, and that it had imposed regulations, namely, should the theory which is being suggested be correct, the Apostolic Decrees.