The next step is suggested by Gen. xxxvi. 31-39, a passage from JE in which a list of Edomite kings is given with this heading: "These are the kings that reigned in the land of Edom before there reigned any king over the children of Israel." That sentence clearly cannot have been written before kings arose in Israel; consequently JE must be later than the days of Saul, and probably than David, since the Israelite kingship appears to the author's mind here as a firmly established institution. The author of Deuteronomy must have lived and written at a still later date, and we are thus gradually brought down to the time of Solomon, or perhaps even later. And the literary indications of date confirm this conclusion. For instance, two books are quoted occasionally in JE as authorities, which must consequently have existed before that work--the Book of the Wars of Yahweh (Numb. xxi. 14, 15), and the Book of Yashar (Josh. x. 12 f.). The former has indeed been declared by Geiger to be the product of false punctuation; but soberer critics have accepted it and date it in Solomon's day. However that may be, there can be no doubt that the latter actually existed, and was probably a collection of songs, since from it the verses describing the standing still of the sun and moon are quoted. But we learn from 2 Sam. i. 18 that David's beautiful lament for Saul and Jonathan was contained in this book, and was quoted from it by the sacred historian. The book must therefore have been compiled, or at least completed, after David's lament. As it was manifestly a compilation, and the poems it contained may have been of very various ages, much stress in our search for dates cannot be laid upon it. It is still of some weight, however, that this post-Davidic book is quoted by JE; so far as it goes, that fact confirms the conclusion arrived at from other indications. In the same way, the linguistic indications, though not of themselves conclusive, point towards the same period. It is, of course, true that we are as yet far from having a general agreement as to the history of the Hebrew language. That can only be established along with the history of the Hebrew literature and the Hebrew people; and perhaps we never shall be able to fix any definite stages in the growth and decay of the language. Nevertheless no careful reader of JE will deny what Professor Driver says regarding them: "Both belong to the golden period of Hebrew literature. They resemble the best parts of Judges and Samuel (much of which cannot be greatly later than David's own time); but whether they are actually earlier or later than these, the language and style do not enable us to say. There is at least no _archaic_ flavour perceptible in the style of JE."[9] That is an admirably balanced judgment, and we may rely upon the indication it gives as an additional confirmation of what we have already seen to be probable. [9] _Introduction_, p. 117.