Such being the state of the case, let the pupil never trouble her memory for one moment with so idle an effort as that of minutely fixing or retaining dates that, after all, are more doubtful, and for us irrecoverable, than the path of some obscure trading ship in some past generation through the Atlantic Ocean. Generally, it will be quite near enough to the truth if she places upon the meridian of 1000 years B.C. the three Romances--Argonautic, Theban, Trojan; and she will then have the satisfaction of finding that, as at the opening of authentic history, she found the Roman, the Greek, and the Asiatic inaugural events coinciding in the same exact focus, so in these semi-fabulous or ante-Olympian events, she finds that one and the same effort of memory serves to register _them_, and also the most splendid of the Jewish eras--that of David and Solomon. The round sum of 1000 years B.C., so easily remembered, without distinction, without modification, '_sans phrase_' (to quote a brutal regicide), serves alike for the Seven-gated Thebes,[39] for Troy, and for Jerusalem in its most palmy days. V. _A Perplexity Cleared Up._--Before passing onward here, it is highly important to notice a sort of episode in history, which fills up the interval between 777 and 555, but which is constantly confounded and perplexed with what took place before 777. The word _Assyria_ is that by which the perplexity is maintained. The Assyrian empire, as the pupil is told, was destroyed in the person of Sardanapalus. Yet, in her Bible, she reads of Sennacherib, King of Assyria. 'Was Sennacherib, then, before Sardanapalus?' she will ask; and her teacher will inform her that he was not. Such things puzzle her. They seem palpable contradictions. But now let her understand that out of the Assyrian empire split off three separate kingdoms, of which one was called the Assyrian, not empire, but kingdom; there lurks the secret of the error. And to this kingdom of Assyria it was that Sennacherib belonged. Or, in order to represent by a sensible image this derivation of kingdoms from the stock of the old superannuated Assyrian empire (to which belonged Nimrod, Ninus, and Semiramis--those mighty phantoms, with their incredible armies); let her figure to herself some vast river, like the Nile or the Ganges, with the form assumed by its mouths. Often it will happen, where such a river is not hemmed in between rocks, or confined to the bed of a particular valley, that, perhaps, a hundred or two of miles before reaching the sea, upon coming into a soft, alluvial soil, it will force several different channels for itself. As these must make angles to each other, in order to form different roads, the land towards the disemboguing of the river will take the arrangement of a triangle. And as that happens to be the form of a Greek capital D (in the Greek alphabet called Delta), it has been usual to call such an arrangement of a great river's mouth a Delta.