In what way this influence was communicated is a question on which some difference of opinion may exist. Some writers, such as Kuenen, think that the indebtedness of Ezekiel to Jeremiah was mainly literary. That is to say, they hold that it must be accounted for by prolonged study on Ezekiel’s part of the written prophecies of him who was his teacher. Kuenen surmises that this happened after the destruction of Jerusalem, when some friends of Jeremiah arrived in Babylon, bringing with them the completed volume of his prophecies. Before Ezekiel proceeded to write his own prophecies, his mind is supposed to have been so saturated with the ideas and language of Jeremiah that every part of his book bears the impress and betrays the influence of his predecessor. In this fact, of course, Kuenen finds an argument for the view that Ezekiel’s prophecies were written at a comparatively late period of his life. It is difficult to speak with confidence on some of the points raised by this hypothesis. That the influence of Jeremiah can be traced in all parts of the book of Ezekiel is undoubtedly true; but it is not so clear that it can be assigned equally to all periods of Jeremiah’s activity. Many of the prophecies of Jeremiah cannot be referred to a definite date; and we do not know what means Ezekiel had of obtaining copies of those which belong to the period after the two prophets were separated. We know, however, that a great part of the book of Jeremiah was in writing several years before Ezekiel was carried away to Babylon; and we may safely assume that amongst the treasures which he took with him into exile was the roll written by Baruch to the dictation of Jeremiah in the fourth year of Jehoiakim (Jer. xxxvi.). Even later oracles may have reached Ezekiel either before or during his prophetic career through the active correspondence maintained between the exiles and Jerusalem. It is possible, therefore, that even the literary dependence of Ezekiel on Jeremiah may belong to a much earlier time than the final issue of the book of Ezekiel; and if it should be found that ideas in the earlier part of the book suggest acquaintance with a later utterance of Jeremiah, the fact need not surprise us. It is certainly no sufficient reason for concluding that the whole substance of Ezekiel’s prophecy had been recast under the influence of a late perusal of the work of Jeremiah.