A third survey of the period beginning with the sojourn in Egypt and concluding with the conquest of the east-Jordan land is found in the introduction to the book of Deuteronomy. It is the prologue to the laws that follow, appropriately and effectively placed in the mouth of the pioneer prophet Moses. A comparison quickly demonstrates that it is in reality a brief summary of the older histories, and especially of the early Ephraimite prophetic. Like the Gospel of Matthew, its aim is not merely to present historical facts, but to illustrate and establish a thesis. The thesis is that Jehovah has personally led his people, and that when they have been faithful to him they have prospered, but when they have disobeyed calamity has overtaken, them. The message is distinctly prophetic; and to distinguish this third history, which was probably written near the close of the seventh century before Christ, from the earlier, it may be designated as the late prophetic or _Deuteronomic history_ (technically represented by D). [Sidenote: _Comparison of the Old with the New Testament histories_] These three prophetic histories correspond strikingly to the three synoptic Gospels: Mark, Luke and Matthew. The essential differences in their literary history are that they come, not from a single limited group of writers and a brief quarter century, but represent the work of many hands and at least two hundred and fifty years of literary activity. Two, at least, of these histories, are no longer extant in their original form, but only as they have been quoted verbatim by later historians and closely amalgamated. Similarly, as is well known, Tatian, the pupil of Justin Martyr, in the middle of the second Christian century, did for the four Gospels precisely what an Old Testament editor did for the two early prophetic histories,--he combined them into one composite, continuous narrative. By joining passages and verses and parts of verses taken from the different Gospels, by omitting verbal duplicates, by rearranging in some cases and by occasionally adding a word or phrase to join dissimilar parts, Tatian produced a marvellous mosaic gospel, known as the _Diatessaron_. All of the Fourth Gospel is thus preserved, and most of the first three. So successfully was the work done that the volume was widely used throughout the Eastern Church. If, as once seemed possible, it had completely supplanted the original four Gospels, the literary history of these would have been a repetition of that of the earliest Old Testament records. [Sidenote: _The dominant motive of the prophetic historians_.]