An eagle flew thrice round Tarquin's head, removing his cap to replace it, and thereupon Tanaquil, his wife, declared that Tarquin would be king of Rome. But only by the replacing of the cap was that omen accounted good. Ahab's hat was never restored; the wild hawk flew on and on with it; far in advance of the prow: and at last disappeared; while from the point of that disappearance, a minute black spot was dimly discerned, falling from that vast height into the sea.