“You shall see,” said Pedro, cocking his rifle.

“But—but no weapon short of a cannon will carry so far—at least with accuracy,” exclaimed Lawrence in surprise, for at the time of which we write breech-loaders and the long-range weapons of precision had not been introduced in those regions. Indeed, the armies of South America, and of Europe also, still slew each other with the familiar Brown Bess and the clumsy flint-lock at that time.

Pedro paid no attention to the remark, but, dismounting, slowly raised the rifle to his shoulder. The guide was one of those men who seem to live in advance of their age. He had thought out, and carried out in a rough-and-ready manner, ideas which have since been scientifically reduced to practice. Being well aware that any projectile is drawn downward in its flight by the law of gravitation, and that if you want to hit a distant point you must aim considerably above it, he had, by careful experiment, found out how high above an object at a given distance one must aim in order to hit, and, by constant practice in judging distance, as well as in taking aim above his mark, he had attained to such skill as a long-range marksman that his friends almost believed it impossible for game to get beyond the range of his deadly weapon, and foes never felt easy till they were entirely out of his sight. The comparative slowness, too, of the flint-lock in discharging a rifle, had necessitated in him a degree of steadiness, not only while taking aim, but even after pulling the trigger, which rendered him what we might term statuesque in his action as he levelled his piece.

For a few seconds the rock beside him was not more steady. Then the cliffs burst into a fusillade of echoes, and the guanacos leaped wildly up the mountain-side, leaving one of their number on the rocks behind them.

It was some time before the young Englishman could get over his astonishment at this feat, for Pedro had pointed his weapon so high that he did not appear to be aiming at the animal at all, and he maintained an animated discussion with the mountaineer until they reached a part of the pass which proved to be somewhat dangerous.

And here they met with a party of muleteers crossing the mountains in the opposite direction. They were still far above them when first observed descending the same steep and narrow road.

“We will wait here till they pass,” said the guide, pulling up at a point where the width of the track was considerable. “I see by the escort that they carry something of value—probably bars of silver from one of the mines. They have reached the worst part of the pass. I shouldn’t wonder to see one of the mules go over—they often do.”

“And always get killed, I suppose,” said Lawrence.

“Not always. Now and then they have wonderful escapes, but many hundreds have been lost here. See!”

As he spoke one of the baggage-mules of the party touched the cliff with its load. This caused the animal to stagger; his hind-legs actually went over the precipice, and the loose stones began to roll away from under his hoofs. With his fore-feet, however, still on the narrow track, he held on bravely, even sticking his nose on the ground, so that he had the appearance of holding on by his teeth! Two of the peons rushed to render assistance, but before they reached him he had slipped, and rolled down the awful slope which ended in a sheer perpendicular precipice. Here he bounded off into space, and next moment fell, baggage and all, with a tremendous splash into the river.