The eighth and seventh centuries before Christ were periods of intense prophetic activity both in the North and the South. It was natural, therefore, that these early prophetic histories should be supplemented by the disciples of the original historians. Traditions that possessed a permanent historical or religious value, as, for example, the familiar story of Cain and Abel (Gen. iv. 2-16), and the earlier of the two accounts of the flood, were thus added. Also when in 722 B.C. the northern kingdom fell and its literary heritage passed to Judah, it was most natural that a prophetic editor, recognizing the valuable elements in each, and the difficulties presented by the existence of the two variant versions of the same events, should combine the two, and furthermore that, in the days of few manuscripts, the older originals should be lost and only the combined history survive. To-day we find this in turn incorporated in the still later composite history extending from Genesis through Samuel.
[Sidenote: Method of combining]
The later editor's method of uniting his sources is exceedingly interesting, and is analogous in many ways to the methods followed in the citations in Matthew and Luke from their common sources, the original Mark and Matthew's Sayings of Jesus. Where the two versions were closely parallel, as in the account of Jacob's deception of his father Isaac, or the story of the spies, the two are completely amalgamated; short passages, verses, and parts of verses are taken in turn from each. In other cases the editor introduced the different versions—as, for example, the two accounts of the flight of Hagar—into different settings. From subsequent allusions to two versions, of which only one survives in the Old Testament, it is to be inferred that sometimes he simply preserved the fuller, usually the Judean. As a rule, however, there is clear evidence that he made every effort to retain all that he found in his original sources, even though the resulting composite narrative contained many inconsistencies.
[Sidenote: Practical value of the rediscovery of the original histories]
To the careful student, seeking to recover the original narratives in their primal unity, these inconsistencies are guides as valuable as the fossils and stratification of the earth are to the geologist intent upon tracing the earth's past history. Guided by these variations and the distinctive peculiarities in vocabulary, literary style, point of view, religious conceptions, and purpose of each of the groups of narratives, Old Testament scholars have rediscovered these two original histories; and with their recovery the great majority of seeming inconsistencies and many perplexing problems fade into insignificance. Supplementing each other, as do the earliest Gospels, these two independent histories present with new definiteness and authority the essential facts in Israel's early political, social and religious life. Like eye-witnesses, they testify to the still more significant fact that from the first God was revealing his character and will through a unique race.
[Sidenote: The brief late prophetic history]
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.]