These slow movements in the "horse latitudes" were not distasteful to me. A calm furnished abundant food for curiosity. The immense fields of gulf-weed, with their parasitical inhabitants, that we now began to fall in with; the stately species of nautilus, known as he Portuguese man-of-war, floating so gracefully, with its transparent body and delicate tints; and the varieties of fish occasionally seen, including the flying-fish, dolphin, boneta, and shark, all furnish to an inquiring mind subjects of deep and abiding interest. My wonder was also excited by the singularly glassy smoothness of the surface of the water in a dead calm, while at the same time the long, rolling waves, or "seas," kept the brig in perpetual motion, and swept past as if despatched by some mysterious power on a mission to the ends of the earth.

Several kinds of fish that are met with on the ocean are really palatable, and find a hearty welcome in the cabin and the forecastle. To capture these denizens of the deep, a line, to which is attached a large hook baited with a small fish, or a piece of the rind of pork, shaped to resemble a fish, is sometimes kept towing astern in pleasant weather. This was the custom on board the Dolphin; and one afternoon, when the brig, fanned by gentle zephyrs, hardly had "steerage way," my attention was aroused by an exulting shout from the man at the helm, followed by a solemn asserveration, that "a fish was hooked at last."

All was bustle and excitement. Discipline was suddenly relaxed, and the captain, mate, and crew mounted the taffrail forthwith to satisfy their curiosity in regard to the character of the prowling intruder, which was distinctly seen struggling in the wake. It proved to be a shark. But the fellow disdained to be captured by such ignoble instruments as a cod line and a halibut hook. He remained comparatively passive for a time, and allowed himself to be hauled, by the united efforts of the crew, some three or four fathoms towards the brig, when, annoyed by the restraint imposed upon him, or disliking the wild and motley appearance of the ship's company, he took a broad sheer to starboard, the hook snapped like a pipestem, and the hated monster swam off in another direction, wagging his tail in the happy consciousness that he was "free, untrammelled, and disinthralled."

"Never mind," said Mr. Thompson, making an effort to console himself for the disappointment, "we'll have the rascal yet."

The shark manifested no disposition to leave our neighborhood, or in any other way showed displeasure at the trick we had played him. On the contrary, he drew nearer the vessel, and moved indolently and defiantly about, with his dorsal fin and a portion of his tail above the water. He was undoubtedly hungry as well as proud, and it is well known that sharks are not particular with regard to the quality of their food. Every thing that is edible, and much which is indigestible, is greedily seized and devoured by these voracious fish.

We had no shark hook on board; nevertheless, the mate lost no time in making arrangements to capture this enemy of sailors. He fastened a piece of beef to the end of a rope and threw it overboard, letting it drag astern. This attracted the attention of the shark, who gradually approached the tempting morsel, regarding it with a wistful eye, but with a lurking suspicion that all was not right.

It was now seen that the shark was not alone, but was attended by several fish of small size, beautifully mottled, and measuring from four to eight or ten inches in length. They swam boldly around the shark, above and beneath him, and sometimes passed directly in front of his jaws, while the shark manifested no desire to seize his companions and satisfy his hunger. These were "pilot fish," and in the neighborhood of the tropics a shark is seldom seen without one or more attendants of this description.

Two of these pilot fish swam towards the beef, examined it carefully with their eyes, and rubbed it with their noses, and then returned to their lord and master. It required but a slight stretch of the imagination to suppose that these well-meaning servants made a favorable report, and whispered in his ear that "all was right," and thus unwittingly betrayed him to his ruin.

Be that as it will, the shark now swam boldly towards the beef, as if eager to devour it; but Mr. Thompson hauled upon the rope until the precious viand was almost directly beneath the taffrail. In the mean time the mate had caused a running bowline, or noose, to be prepared from a small but strong rope. This was lowered over the stern into the water, and by a little dexterous management, the shark was coaxed to enter it in his eagerness to get at the beef. The mate let fall the running part of the bowline and hauled upon the other, and to the utter bewilderment of the hungry monster, he found himself entrapped in the power of his mortal enemies being firmly and ingloriously fastened by the tail. When he discovered the inhospitable deception of which he was the victim he appeared angry, and made furious efforts to escape; but the rope was strong, and his struggles served only to draw the noose tighter.

The shark was hauled on board, and made a terrible flouncing on the quarter-deck before he could be despatched. It was interesting to witness the eagerness with which he was assailed by the sailors. This animal is regarded as their most inveterate foe, and they seize with avidity any chance to diminish the numbers of these monsters of the deep. It was some time before he would succumb to the murderous attacks of his enemies. He wreaked his vengeance on the ropes around him, and severed them with his sharp teeth as completely and smoothly as if they had been cut with a knife. But when his head was nearly cut off, and his skull beat in by the cook's axe and handspikes, the shark, finding further resistance impossible as well as useless, resigned himself to his fate.