In the first book, Zeus has promised Thetis, that he will punish the Greeks for the wrong done to Achilles: in the beginning of the second book, he deliberates how he shall fulfil the promise, and sends down for that purpose “mischievous Oneirus” (the Dream-god) to visit Agamemnôn in his sleep, to assure him that the gods have now with one accord consented to put Troy into his hands, and to exhort him forthwith to the assembling of his army for the attack. The ancient commentators were here perplexed by the circumstance that Zeus puts a falsehood into the mouth of Oneirus. But there seems no more difficulty in explaining this, than in the narrative of the book of 1 Kings (chap. xxii. 20), where Jehovah is mentioned to have put a lying spirit into the mouth of Ahab’s prophets,—the real awkwardness is, that Oneirus and his falsehood produce no effect. For in the first place, Agamemnôn takes a step very different from that which his dream recommends,—and in the next place, when the Grecian army is at length armed and goes forth to battle, it does not experience defeat, (which would be the case if the exhortation of Oneirus really proved mischievous,) but carries on a successful day’s battle, chiefly through the heroism of Diomêdês. Instead of arming the Greeks forthwith, Agamemnôn convokes first a council of chiefs, and next an agora of the host. And though himself in a temper of mind highly elate with the deceitful assurances of Oneirus, he deliberately assumes the language of despair in addressing the troops, having previously prepared Nestor and Odysseus for his doing so,—merely in order to try the courage of the men, and with formal instructions, given to these two other chiefs, that they are to speak in opposition to him. Now this intervention of Zeus and Oneirus, eminently unsatisfactory when coupled with the incidents which now follow it, and making Zeus appear, but only appear, to realize his promise of honoring Achilles as well as of hurting the Greeks,—forms exactly the point of junction between the Achillêis and the Iliad.[292] [292] The intervention of Oneirus ought rather to come as an immediate preliminary to book viii. than to book ii. The first forty-seven lines of book ii would fit on and read consistently at the beginning of book viii, the events of which book form a proper sequel to the mission of Oneirus.