The Acts of the Apostles contains the history of the Christian church from the time of the ascension of our Lord to the end of the second year of Paul's first imprisonment at Rome. The period covered by the history is therefore only about thirty years. The principal events recorded in it are the great Pentecostal Revival, the Martyrdom of Stephen, the first persecution of the church and the dispersion of the disciples, the conversion and the missionary work of Paul, with the circumstances of his arrest at Jerusalem, his journey as a prisoner to Rome, and a brief account of his residence in that city. In the first part of the book Peter, the leader of the apostolic band, is the central figure; the last part is occupied with the life and work of Paul. Who is the writer? Irenæus, about 182, names Luke as the author of the book, and speaks as though the fact were undisputed. He calls him "a follower and disciple of apostles," and declares that "he was inseparable from Paul and was his fellow-helper in the gospel." This is the earliest distinct reference to the book in any ancient Christian writing. After this, Clement of Alexandria, Tertullian, Origen, and Eusebius bear the same testimony. But these are late witnesses. The earliest of them testified a hundred years after the death of Luke. The direct testimony to the existence of this book in the first two cenuries is not, therefore, altogether satisfactory. The indirect testimony is, however, clear and strong. That the Acts was written by the author of the Third Gospel is scarcely doubted by any critical scholar. The fact of the identity of authorship is stated with the utmost explicitness in the introduction of the Acts. "The former treatise I made, O Theophilus, concerning all that Jesus began both to do and to teach" (Luke i. I, 2). The author of the Acts of the Apostles certainly intends to say that he is the writer of the Third Gospel. If he is not the author of the Third Gospel he is an artful and shameless deceiver. But the whole atmosphere of the book forbids the theory that it is a cunning imposition. And the internal evidence that the two books were written by the same author is ample and convincing. The style and the method of the treatment of the two books are unmistakably identical. Every page bears witness to the fact that the author of the Third Gospel and the author of the Acts are one and the same person. Now we know, beyond all reasonable doubt, that the Gospel of Luke was written certainly as early as the year 80 A. D. And there is as good reason, as we have seen already, for accepting the ancient and universal tradition of the church that Luke was its author. If Luke wrote the two books, the date of both of them is carried back to the last part of the first century. But the concluding portion of the Acts of the Apostles seems to fix the date of that book much more precisely. The author, after narrating Paul's journey to Rome, his arrival there,