Have any of you made a passage on board a steamer between London and Leith? If you have, you will have seen no small number of brigs and brigantines, with sails of all tints, from doubtful white to decided black—some deeply-laden, making their way to the southward, others with their sides high out of the water, heeling over to the slightest breeze, steering north. She must have been named after a negress naiad, for black was the prevailing colour on board, from the dark, dingy forecastle to the captain’s state cabin, which was but a degree less dirty than the portion of the vessel in which I was destined to live. The bulwarks, companion-hatch, and other parts had, to be sure, once upon a time been painted green, but the dust from the coal, which formed her usual cargo, had reduced every portion to one sombre hue, which even the salt seas not unfrequently breaking over her deck had failed to wash clean.