The Diatessaron has long intrigued scholars of New Testament and early Christianity because of its unique place in Gospel translations, its role in the spread of Christianity within the Syriac speaking world, and the fact that the Syriac text of this very influential text no longer survives in any known extant manuscript. The text does survive in later translations, most notably in Arabic, but the best source for the Syriac text is the Commentary on the Diatessaron written by Ephrem the Syrian in the fourth century. In the present work, Samuel Hemphill uses these two sources to produce an English translation of the text of the Diatessaron to the extent that it can be reconstructed. Hemphill includes a helpful introduction to Tatian and Diatessaron studies and also provides several appendices with more information on various topics pertaining to Diatessaron studies.