Going ashore to-day, we beached the boat, and a large negro, with a ragged red shirt, waded out and took me on his shoulders. There is no position so absurd, nor in which a man feels himself so utterly helpless, as when thus dependant on the strength and sure-footedness of a fellow-biped. As we left the boat, a heavy "roller" came in. The negro lost his footing, and I my balance, and down we plunged into the surf. My sable friend seemed to consider it a point of duty to hold stoutly by my legs, the inevitable tendency of which manoeuvre was to keep my head under water. Having no taste for a watery death, under these peculiar circumstances, I freed myself by a vigorous kick, sprang to my feet, and seizing the negro by the "ambrosial curls," pushed his head in turn under the surf. But seeing the midshipmen and boat's crew laughing, noiselessly but heartily, at my expense, the ludicrousness of the whole affair struck me so forcibly that I joined in their mirth, and waded ashore as fast as possible. An abolitionist, perhaps, might draw a moral from the story, and say that all, who ride on the shoulders of the African race, deserve nothing better than a similar overthrow. Sailed from Porto Praya. The bay of this port is a good one, except in south-east gales, when the anchorage is dangerous. The town, called Villa de Praya, contains about two thousand inhabitants of every shade, the dark greatly predominating. Many vessels from Europe and the United States, bound to India, Brazil, or Africa, find this a convenient place to procure water and fresh provisions, and bring, in return, much money into the city. There are three hundred troops here, nearly all black, and commanded by forty Portuguese officers. The men are under severe discipline, are tolerably well dressed, and make a soldierly appearance. It is said that a St. Jago soldier formerly wore only a cocked hat, being otherwise in a state of nature; but I cannot pretend to have seen any instance of this extreme scantiness of equipment. 23.--Saw a large green turtle asleep on the surface of the water. One of our boats went alongside of him, and two men attempted to turn him over with boat-hooks. He struggled successfully, however, to keep himself "right side up," and, in a few moments, plunged beneath the surface. Once upon his back, he would have been powerless and a prisoner, and we might have hoped for the advantage of his presence at our mess-table. 24.--At noon, the first rain came. It continued heavy and unremitting, for twenty-four hours, after which there was a glimpse of the blue sky. Two startling thunder-claps burst over the ship, at about 9 o'clock, A.M. Last night, at 10, a heavy plunge carried away both our chain bobstays at once, and all hands were turned up in the rain, to secure the bowsprit.