Kuenen, Hexateuch, §§ 3 n.
In the exile, but probably after 50o B.C., an important section of the Hexateuch, usually called the Priest's Code (P), was drawn up. At various times in the same century are to be placed the book of Job, the post-exilic parts of Isaiah, the books of Joel, Jonah, Malachi and the Song of Songs.
The Pentateuch (or Hexateuch) was finally completed in its present form at some time before 400 B.C. The latest parts of the Old Testament are the books of Chronicles, Ezra and Nehemiah (c. 330 B.C.), Ecclesiastes and Esther (3rd century) and Daniel, composed either in the 3rd century or according to some views as late as the time of Antiochus Epiphanes (c. 168 B.C.).
In 1886 his volume on the Hexateuch was published in England.
Kuenen was also the author of many articles, papers and reviews; a series on the Hexateuch, which appeared in the Theologisch Tijdschrift, of which in 1866 he became joint editor, is one of the finest products of modern criticism.