First of all, a quarter of a mile away to windward, your eye is caught by an uncommonly high wave, rushing right upon your track, and heaping up slowly and constantly as it comes, as if some huge animal were ploughing his path steadily and powerfully beneath the surface. Its "ground," as a painter would say, is of a deep indigo, clear and smooth as enamel, its front curved inward, like a shell, and turned over at the summit with a crest of foam, flashing and changing perpetually in the sunshine, like the sudden outburst of a million of "unsunned diamonds;" and, right through its bosom, as the sea falls off, or the angle of refraction changes, there runs a shifting band of the most vivid green, that you would take to have been the cestus of Venus, as she rose from the sea, it is so supernaturally translucent and beautiful. As it nears you, it looks in shape like the prow of Cleopatra's barge, as they paint it in the old pictures; but its colors, and the grace and majesty of its march, and its murmur (like the low tones of an organ, deep and full, and, to my ear, ten times as articulate and solemn), almost startle you into the belief that it is a sentient being, risen glorious and breathing from the ocean. As it reaches the ship, she rises gradually, for there is apparently an under-wave driven before it, which prepares her for its power; and as it touches the quarter, the whole magnificent wall breaks down beneath you with a deafening surge, and a volume of foam issues from its bosom, green and blue and white, as if it had been a mighty casket in which the whole wealth of the sea, crysoprase, and emerald, and brilliant spars, had been heaped and lavished at a throw. This is the "tenth wave," and, for four or five minutes, the sea will be smooth about you, and the sparkling and dying foam falls into the wake, and may be seen like a white path, stretching away over the swells behind, till you are tired of gazing at it. Then comes another from the same direction, and with the same shape and motion, and so on till the sun sets, or your eyes are blinded and your brain giddy with splendor.