Thus the poet of Book IX.--one of "the latest expansions,"--thoroughly understands the legal and constitutional situation, as between Agamemnon and Achilles. Or rather all the poets who collaborated in Book IX., which "had grown by a process of accretion," [Footnote: Leaf, Iliad, vol. i. p. 371.] understood the legal situation. Returning to the poet's conception of Agamemnon, we find in the character of Agamemnon himself the key to the difficulties which critics discover in the Second Book. The difficulty is that when Zeus, won over to the cause of Achilles by Thetis, sends a false Dream to Agamemnon, the Dream tells the prince that he shall at once take Troy, and bids him summon the host to arms. But Agamemnon, far from doing that, summons the host to a peaceful assembly, with the well-known results of demoralisation. Mr. Leaf explains the circumstances on his own theory of expansions compiled into a confused whole by a late editor. He thinks that probably there were two varying versions even of this earliest Book of the poem. In one (A), the story went on from the quarrel between Agamemnon and Achilles, to the holding of a general assembly "to consider the altered state of affairs." This is the Assembly of Book H, but debate, in version A, was opened by Thersites, not by Agamemnon, and Thersites proposed instant flight! That was probably the earlier version. In the other early version (B), after the quarrel between the chiefs, the story did not, as in A, go on straight to the Assembly, but Achilles appealed to his mother, the fair sea-goddess, as in our Iliad, and she obtained from Zeus, as in the actual _Iliad_, his promise to honour Achilles by giving victory, in his absence, to the Trojans. The poet of version B, in fact, created the beautiful figure of Thetis, so essential to the development of the tenderness that underlies the ferocity of Achilles. The other and earliest poet, who treated of the Wrath of the author of version A, neglected that opportunity with all that it involved, and omitted the purpose of Zeus, which is mentioned in the fifth line of the Epic. The editor of 540 B.C., seeing good in both versions, A and B, "combined his information," and produced Books I. and II. of the _ILIAD_ as they stand. [Footnote: Leaf, _Iliad_, vol. i. p. 47.]