“Hark!” she breathed, rather than uttered. “It is coming! We are lost!”

His own countenance changed, too. He had heard it as soon as herself—that dull raving roar, echoing with hollow metallic vibration along the rock walls. His heart almost died within him before the awfulness of this peril.

“Oh no, nothing like that,” he replied. “We must race it. We shall distance it yet, if we only keep our heads.”

The while he had put her into the saddle. Then taking the bridle, he began to lead her pony over the dangerous point of the way. The brute slipped and stumbled, now sliding, now about to pitch headlong, but both got through.

“Now for it, Nessie. Give him all the pace you can, but keep him in hand. We’ll race it easily.”

Down the tangi now, giving their steeds all the rein they dared, these two rode for dear life. Then Nesta’s pony stumbling over a loose stone, came right down, unhorsing his rider.

“Don’t leave me! Oh don’t leave me!” she shrieked despairingly. “I can’t move, my skirt is caught.”

“Leave you. Is it likely? What do you take me for?” came his reply, as in a moment he was dismounted and beside her. “Keep your head. It will be all right in a moment. There!” as a vigorous tug brought the skirt clear of the fallen animal, which lay as though stunned.

But as she gained her feet, the dull hollow booming, which had been deepening ever behind them, became suddenly a roar of such terrible and appalling volume, that Campian’s steed, with a wild snort of alarm jerked the bridle rein from his hand, and bolted wildly down the pass. It all came before him as in a lightning flash. The utter hopelessness of the situation. The flood had turned the corner of the reach they were now in. He saw it shoot out from the projecting ridge, and hurl itself with thunderous shock against the opposite rock face. Hissing and bellowing it sprung high in the air, then, flung back, amid a vast cloud of spray, it roared down upon them. One glance and only one, lest the terror of the sight should paralyse him, and he realised that in about two or three minutes that flood would be hurling their lifeless bodies from side to side against those grim rock walls.