In the surrounding water, one could trace the meteor course of some monster of the deep, whose dive left behind a long brilliant stream of fire like a rocket. Suddenly the ocean would apparently become alive with these flashes of light, as a shoal of porpoises dashed into sight with the velocity of a troop of wild horse, leaping and shying in their merry race. They cross the brilliant wake of the ship, and, with a regular wheel, like a squadron of cavalry, charge after her. The ten knots per hour that the log has given as the gallant ship's speed, make but little difference to these aquatic rovers. They open their line as they near, and now they are under the stern; in a second they have passed, in a few more are far on ahead, jumping about near the bows, and taking each valley of the rolling sea in true sporting style. Then, with another sweep, they dash down upon us, and, after inspecting the ship for a minute, disappear with the same reckless speed, leaving two or three outsiders, who, not getting a fair start, appear to ply whip and spur to regain their position with the main body. The sea is then doubly dark and mysterious. The morning light would show the ocean covered with the beautiful little Portuguese men-of-war (_Physalus_), whose brilliant reflection of the prismatic colours would raise a feeling of ambition for their capture. An hour was passed in the endeavour to become more closely acquainted with them, by means of a little net over the ship's side--the result, like many others in this world, was disappointment. A man-of-war is caught, but, upon its reaching the deck, is found to consist of a small bladder, now destitute of those attractions that had tempted our eyes, and a few long muscular strings, that raise a red smarting line wherever they touch the skin. This curious creature declines exhibiting its beauties during captivity. I had many theoretical lessons in seamanship from the mate during this fine weather, and many interesting anecdotes of whaling adventures. He was very anxious to pass safely round the Cape, and, upon my inquiring the reason, he gave me the following account of his last trip, which had taken place some four years before:--