John Rex had put into execution the first part of his scheme.

At the moment when, seeing Burgess’s boat near the sand-spit, he had uttered the warning cry heard by Vetch, he turned back into the darkness, and made for the water’s edge at a point some distance from the Neck. His desperate hope was that, the attention of the guard being concentrated on the escaping boat, he might, favoured by the darkness and the confusion — swim to the peninsula. It was not a very marvellous feat to accomplish, and he had confidence in his own powers. Once safe on the peninsula, his plans were formed. But, owing to the strong westerly wind, which caused an incoming tide upon the isthmus, it was necessary for him to attain some point sufficiently far to the southward to enable him, on taking the water, to be assisted, not impeded, by the current. With this view, he hurried over the sandy hummocks at the entrance to the Neck, and ran backwards towards the sea. In a few strides he had gained the hard and sandy shore, and, pausing to listen, heard behind him the sound of footsteps. He was pursued. The footsteps stopped, and then a voice cried —

“Surrender!”

It was McNab, who, seeing Rex’s retreat, had daringly followed him. John Rex drew from his breast Troke’s pistol and waited.

“Surrender!” cried the voice again, and the footsteps advanced two paces.

At the instant that Rex raised the weapon to fire, a vivid flash of lightning showed him, on his right hand, on the ghastly and pallid ocean, two boats, the hindermost one apparently within a few yards of him. The men looked like corpses. In the distance rose Cape Surville, and beneath Cape Surville was the hungry sea. The scene vanished in an instant — swallowed up almost before he had realized it. But the shock it gave him made him miss his aim, and, flinging away the pistol with a curse, he turned down the path and fled. McNab followed.

The path had been made by frequent passage from the station, and Rex found it tolerably easy running. He had acquired — like most men who live much in the dark — that cat-like perception of obstacles which is due rather to increased sensitiveness of touch than increased acuteness of vision. His feet accommodated themselves to the inequalities of the ground; his hands instinctively outstretched themselves towards the overhanging boughs; his head ducked of its own accord to any obtrusive sapling which bent to obstruct his progress. His pursuer was not so fortunate. Twice did John Rex laugh mentally, at a crash and scramble that told of a fall, and once — in a valley where trickled a little stream that he had cleared almost without an effort — he heard a splash that made him laugh outright. The track now began to go uphill, and Rex redoubled his efforts, trusting to his superior muscular energy to shake off his pursuer. He breasted the rise, and paused to listen. The crashing of branches behind him had ceased, and it seemed that he was alone.

He had gained the summit of the cliff. The lights of the Neck were invisible. Below him lay the sea. Out of the black emptiness came puffs of sharp salt wind. The tops of the rollers that broke below were blown off and whirled away into the night — white patches, swallowed up immediately in the increasing darkness. From the north side of the bay was borne the hoarse roar of the breakers as they dashed against the perpendicular cliffs which guarded Forrestier’s Peninsula. At his feet arose a frightful shrieking and whistling, broken at intervals by reports like claps of thunder. Where was he? Exhausted and breathless, he sank down into the rough scrub and listened. All at once, on the track over which he had passed, he heard a sound that made him bound to his feet in deadly fear — the bay of a dog!

He thrust his hand to his breast for the remaining pistol, and uttered a cry of alarm. He had dropped it. He felt round about him in the darkness for some stick or stone that might serve as a weapon. In vain. His fingers clutched nothing but prickly scrub and coarse grass. The sweat ran down his face. With staring eyeballs, and bristling hair, he stared into the darkness, as if he would dissipate it by the very intensity of his gaze. The noise was repeated, and, piercing through the roar of wind and water, above and below him, seemed to be close at hand. He heard a man’s voice cheering the dog in accents that the gale blew away from him before he could recognize them. It was probable that some of the soldiers had been sent to the assistance of McNab. Capture, then, was certain. In his agony, the wretched man almost promised himself repentance, should he escape this peril. The dog, crashing through the underwood, gave one short, sharp howl, and then ran mute.

The darkness had increased the gale. The wind, ravaging the hollow heaven, had spread between the lightnings and the sea an impenetrable curtain of black cloud. It seemed possible to seize upon this curtain and draw its edge yet closer, so dense was it. The white and raging waters were blotted out, and even the lightning seemed unable to penetrate that intense blackness. A large, warm drop of rain fell upon Rex’s outstretched hand, and far overhead rumbled a wrathful peal of thunder. The shrieking which he had heard a few moments ago had ceased, but every now and then dull but immense shocks, as of some mighty bird flapping the cliff with monstrous wings, reverberated around him, and shook the ground where he stood. He looked towards the ocean, and a tall misty Form — white against the all-pervading blackness — beckoned and bowed to him. He saw it distinctly for an instant, and then, with an awful shriek, as of wrathful despair, it sank and vanished. Maddened with a terror he could not define, the hunted man turned to meet the material peril that was so close at hand.

With a ferocious gasp, the dog flung himself upon him. John Rex was borne backwards, but, in his desperation, he clutched the beast by the throat and belly, and, exerting all his strength, flung him off. The brute uttered one howl, and seemed to lie where he had fallen; while above his carcase again hovered that white and vaporous column. It was strange that McNab and the soldier did not follow up the advantage they had gained. Courage — perhaps he should defeat them yet! He had been lucky to dispose of the dog so easily. With a fierce thrill of renewed hope, he ran forward; when at his feet, in his face, arose that misty Form, breathing chill warning, as though to wave him back. The terror at his heels drove him on. A few steps more, and he should gain the summit of the cliff. He could feel the sea roaring in front of him in the gloom. The column disappeared; and in a lull of wind, uprose from the place where it had been such a hideous medley of shrieks, laughter, and exultant wrath, that John Rex paused in horror. Too late. The ground gave way — it seemed — beneath his feet. He was falling — clutching, in vain, at rocks, shrubs, and grass. The cloud-curtain lifted, and by the lightning that leaped and played about the ocean, John Rex found an explanation of his terrors, more terrible than they themselves had been. The track he had followed led to that portion of the cliff in which the sea had excavated the............