The little events of the sea outside the steamer offered themselves in their poor variety. Once a ship in the offing, with all its square sails set, lifted them like three white towers from the deep. On the rim of the ocean the length of some westward liner blocked itself out against the horizon, and swiftly trailed its smoke out of sight. A few tramp steamers, lounging and lunging through the trough of the sea, were overtaken and left behind; an old brigantine passed so close that her rusty iron sides showed plain, and one could discern the faces of the people on board. The steamer was oftenest without the sign of any life beyond her. One day a small bird beat the air with its little wings, under the roof of the promenade, and then flittered from sight over the surface, of the waste; a school of porpoises, stiff and wooden in their rise, plunged clumsily from wave to wave. The deep itself had sometimes the unreality, the artificiality of the canvas sea of the theatre. Commonly it was livid and cold in color; but there was a morning when it was delicately misted, and where the mist left it clear, it was blue and exquisitely iridescent under the pale sun; the wrinkled waves were finely pitted by the falling spray. These were rare moments; mostly, when it was not like painted canvas, is was hard like black rock, with surfaces of smooth cleavage. Where it met the sky it lay flat and motionless, or in the rougher weather carved itself along the horizon in successions of surges. If the sun rose clear, it was overcast in a few hours; then the clouds broke and let a little sunshine through, to close again before the dim evening thickened over the waters. Sometimes the moon looked through the ragged curtain of vapors; one night it seemed to shine till morning, and shook a path of quicksilver from the horizon to the ship. Through every change, after she had left the fog behind, the steamer drove on with the pulse of her engines (that stopped no more than a man's heart stops) in a course which had nothing to mark it but the spread of the furrows from her sides, and the wake that foamed from her stern to the western verge of the sea.