Ariel flitted so rapidly along the ledge that her lover felt obliged to ask her to desist, as he found it difficult to keep pace with her.

The narrow path ascended more rapidly than before, and he saw they were steadily climbing toward the top of the roof. The shelly support to their feet, too, became less substantial, crumbling and giving way at a rate that threatened the most serious consequences.

He again cautioned the maiden, who seemed to dart over the rocky ground with the graceful ease of a bird, and without producing any more effect, with her dainty sandals.

Suddenly she paused. She had reached the margin or break in the ledge. A chasm, whose black depths the eye could not fathom, yawned between her and the support on the opposite side.

"We will make our stand here," said he; "keep behind me—"

He checked himself in astonishment; for, at that moment, she bounded as lightly across as a fawn. He never would have permitted it had he dreamed of her intention; but it was done.

He could only follow, and, gathering his muscles, he ran rapidly the slight distance and bounded from the support.

It was a tremendous leap, and, for one instant, he believed he would fail; but he cleared the chasm of breathless darkness and landed on the edge, where, for a single second, he tottered between life and death.

But, at the critical instant, a tiny hand was outstretched, and, seizing one of the fluttering arms, his poise was restored, and he stood firmly by her side.

Even then, as he stepped forward, the ground crumbled and gave way for fully two feet, the debris rattling down the abyss as long as the ear could detect the sound, growing fainter and fainter as it hastened toward the far-away bottom.

"There is no one in that party except Ziffak who can leap it now," said Ashman, gazing with a shudder behind him.

By this time the pursuers were close at hand and gaining fast.

The ledge led straight away and upward for a hundred feet, when it terminated at a point in the dome as high as the middle portion. There the rocks were piled in irregular masses, and, knowing they could go no further, Ashman resolved that the last stand should be made there.

As he hurried onward, another shout fell upon his ear. It was a different voice, and he recognized it as Waggaman's, who was leading the advance.

The fugitive glanced backward, while toiling up the slope, and saw that the white man in his eagerness was fully a rod ahead of the herculean Ziffak, while the rest were stringing along behind him.

He might have wondered how the chieftain contrived to lose so much ground had he not seen him clambering to his feet. It followed that he must have fallen in his hurry to get forward.

"We have them!" shouted the exultant convict; "there is no escape; they are cornered!"

The words were yet ringing in his mouth, when he came to a stop.

He had reached the edge of the abyss and might well pause before trying to leap across.

The fierce king called to him to make the jump. It had been done not only by the man, but by the girl who preceded him; why should he hesitate?

Spurred by the taunt, the white man withdrew a few paces, and, like Ashman, ran swiftly, the next instant his body rising in air, as he made the fatal effort.

The American stood coolly watching the result. If the miscreant succeeded, where it looked impossible, he meant to shoot him. Thus the prospect before the convict could not have been worse.

It was a tremendous leap indeed, and the fellow struck the opposite ledge with his chest, his feet dropping below.

In his furious efforts to save himself, he let go of his weapon, which went ringing down the chasm, and seized the ledge with both hands.

Even then, had the ground been firm, he might have succeeded, but it gave way like rotten ice, and, with a shriek of agony, he vanished forever from the sight of men.

The frightful occurrence brought the pursuers to a halt and gave the fugitives a minute or two in which to prepare for the end.

Ariel, by command of her lover, placed herself behind the rocks and bowlders, where she was secure against any of the missiles, that were sure to be soon flying through the air. Ashman also placed himself so that all of his body was hidden, except his head and shoulders, but his Winchester was thrust out, ready for instant use. He was resolved that no one of the party should leap that chasm and live after reaching the other side.

There were two exceptions, be it remembered, to this resolution.

Ziffak, being next to Waggaman, approached the chasm, where he also stopped and peered into the impenetrable depth, his dusky face showing a horrified expression at the awful fate that had befallen the foremost of the little party.

Ashman, who was closely watching the chieftain with a natural wonder us to how he would conduct himself (for he did not waver in his faith that th............