The editor of the facsimile of the Codex Bezae, which Theodore Beza left to Cambridge (often called D), observed that the Gospels had often been edited to harmonize, or agree with each other, and that these changes were often in the same sections that showed imitations of Syriac. This monograph, part of Vogels' work on the nature and influence of Tatian's Diatessaron, examines the instances of this phenomenon. It lists the instances of substantive change in one Gospel to have it agree with another, the cases in which the transitions between one episode and another have been changed, the cases in which several parallel texts all differ together from the standard text of the Gospels, and provides a list of all harmonizing changes in the Beza Codex.