16.--All day, the wind has been ahead, and very light. This evening, a dead calm is upon the sea; but the sky is cloudless, and the air pure and soft. All the well are enjoying the fine weather. The commodore and captain walk the poop-deck; the other officers, except the lieutenant and young gentlemen of the watch, are smoking on the forecastle, or promenading the quarter-deck. A dozen steady old salts are rolling along the gangways; and the men are clustered in knots between the guns, talking, laughing, or listening to the yarns of their comrades--an amusement to which sailors are as much addicted as the Sultan in the Arabian Nights. But music is the order of the evening. Though a band is not allowed to a ship of our class, there are always good musicians to be found among the reckless and jolly fellows composing a man-of-war's crew. A big landsman from Utica, and a dare-devil topman from Cape Cod, are the leading vocalists; Symmes, the ship's cook, plays an excellent violin; and the commodore's steward is not to be surpassed upon the tambourine. A little black fellow, whose sobriquet is Othello, manages the castanets, and there is a tolerable flute played by one of the afterguard. The concerts usually commence with sentimental songs, such as "Home, sweet Home," and the Canadian Boat Song: but the comic always carries off the palm; "Jim along Josey," "Lucy Long," "Old Dan Tucker," and a hundred others of the same character, are listened to delightedly by the crowd of men and boys collected round the fore-hatch, and always ready to join in the choruses. Thus a sound of mirth floats far and wide over the twilight sea, and would seem to indicate that all goes well among us. But the delicious atmosphere, and the amusements of the ship, bring not joy to all on board. There are sick men swinging uneasily in their hammocks; and one poor fellow, whose fever threatens to terminate fatally, tosses painfully in his cot. His messmates gently bathe his hot brow, and, watching every movement, nurse him as tenderly as a woman. Strange, that the rude heart of a sailor should be found to possess such tenderness as we seldom ask or find, in those of our own sex, on land! There, we leave the gentler humanities of life to woman; here, we are compelled to imitate her characteristics, as well as our sterner nature will permit.