Finally, there seem to have been many prophecies circulated anonymously, and since a place had to be found for these they were inserted in other writers, on no principle that we can discover, or more often were grouped together at the end of some notable Prophet's works. In Zechariah we have to suppose three strata of different authorship and date, or give up the rational study of the Book altogether; and in the famous case of the Book of Isaiah we have to suppose that some of the early chapters are the work of a post-exilic author, while chapters xl.-lxvi. are a heterogeneous collection by a number of writers, of which chapters xl.-lv. are recognised to be by one hand, and that, one of the most wonderful personalities which has contributed to the Old Testament; about that grand figure we only know one thing, that he was not Isaiah of Jerusalem. This has been called "sawing Isaiah asunder" and making the Bible a piece of patchwork and the critics are blamed; but if they are right, these complaints are not directed at them, but at the Bible itself, a proceeding which to say the least, is not pious. When a writer could say many years later that revelation came of old time in many fragments (Heb. i. 1), others beside critics fall under these hasty condemnations. It is refreshing to turn from this less interesting part of our subject, which nevertheless demands serious study from anyone who would be informed where ignorance has done and still is doing so much harm, and to examine the features which distinguish the work of the literary Prophets. We have already spoken of the novelty of their message. Whatever theory is chosen for the study of Old Testament history, nothing quite prepares us for the message of the Prophet Amos. What an inspiration we miss because he does not stand in our Bibles in his rightful place, at the head of the Prophets! His bravery and ruggedness remind us of Elijah, but he brings something that Elijah is far from giving us. Elijah was very jealous for the due recognition of Jehovah as the only God for Israel; Amos is jealous for the recognition of the true _character_ of Jehovah. That is to say, we receive from Amos definite teaching concerning the character of Jehovah and His relations to the people of Israel, and these doctrines are startling to Israelitish ears.