"Now, my companions," the Jaguar continued, "we have no boat in which to reach the base of the fort; the sound of oars striking against the thowls would give the alarm, excite the suspicion of the garrison, and reveal our presence; we must, therefore, cross by swimming; but it is nearly a league to go; the tide runs out fast, and we shall have to cross it at right angles; moreover, the night is dark, and the sea rough. I will only remind you of the sharks and tintoreras we run a risk of meeting on the way. You see, comrades, that it is a rude affair, and it is certain that we shall not all reach the sand strip. Some of us will remain on the road; but what matter, so long as we succeed? You are brave men, so I have preferred to speak openly with you, and allow you to see all the danger, than deceive you, for a peril if known is half overcome." In spite of all their courage, the conspirators felt a spasm at their hearts; still not one of them hesitated, for they had freely offered their lives as a sacrifice; besides, they had now gone too far to recoil; they must proceed at all risks. We must say, in praise of the conspirators, that of all the perils enumerated by the Jaguar, only one really alarmed them. What they most feared was the meeting with the tintorera. We will explain to the reader, who is probably ignorant of the fact, what this dangerous animal is, which possesses the privilege of producing goose flesh in the bravest man, on the mere mention of its name. The seas of Mexico, and especially the coasts, swarm with dangerous fish, among which the shark holds a very honourable place. But, though it be so dangerous, the Mexican pearl diver, who are mostly Indians, care little for it, and bravely fight it, when the opportunity offers. Still, there is a special sort they are extraordinarily afraid of, and that is the tintorera. The tintorera is a shark of the largest size, and owes its name to a peculiarity that reveals its presence at a considerable distance. Holes placed near the snout of the fish distil a gluey matter, which spreads over its whole body, and renders it brilliant as fireflies. These phosphoric gleams are the most splendid on stormy nights, when the wind moans and the thunder growls. The same phenomenon is produced on dark nights; the denser the gloom, the more vivid is the furrow traced by the tintorera. This animal, fortunately, is nearly blind, and, consequently, cannot follow its prey by sight. They are also compelled to turn their belly completely up on seizing their prey. In the pearl islands of the Mexican coast there are several Indian and half-breed divers, who are not at all afraid of fighting them, and who frequently succeed in killing them.