The blacks, poor fellows, were already sound asleep, with Bosin snuggled up between them; and Don was not long in following them into that realm of dreams, where waking cares, if they intrude at all, more often than not lie low and shadowy on the horizon. So Jack was left alone in the darkness and solitude of the Rock.

Kicking off his shoes, and tucking the end of the chain beneath his belt to secure perfect noiselessness of movement, he shouldered a musket, and fell to pacing back and forth past the black orifice that marked the point where the stairway cleft the rocky floor. Monotonous work it was, and weird. The steely glint of the stars, the mournful sobbing of the surf upon the sands, sent an involuntary shiver through his frame. He crept softly to the extreme brink of the chasm and peered into its depths. Below all was pitchy blackness; he could distinguish nothing, save, far down, at an infinite depth as it seemed, the faint, fantastic reflection of a star on the surface of the pool. Occasionally a sound of lazy splashing floated up to where he stood, and he thought with creeping flesh of the horrible, ghoulish surfeit the crocodiles had had that day.

To and fro beneath the steely stars—tramp, tramp, tramp, to the solemn dirge of the sea. Would the laggard moon never rise and put an end to his weird vigil?

Hark! what was that? He paused and listened with suspended breath, his back towards the dim outline of the stairway; listened, but heard only the moaning of the surf and the regular, sonorous breathing of his sleeping companions.

“One of those gorged crocodile beasts got a nightmare,” he muttered, with a smile at the comic aspect of his own fancy. “Ha,” catching sight of a faint, silvery glow in the east, “there's the moon at last. Time to call our fellows; I've had enough of this death's watch, anyhow.”

While uttering these words he made a step forward with the intention of calling Don and the blacks, when something whizzed swiftly through the air, he felt a sharp twinge, an intense burning sensation in his left arm, a deathly faintness stealing over him, and realised that he was wounded—wounded by a dexterously-thrown knife, which, had it not been for that timely forward stride, must have buried itself deep in his back. Luckily, in spite of the pain and giddiness, he retained his presence of mind. Quick as a flash he, wheeled, brought the hammer of the musket to full cock, and the musket itself to his shoulder. Above the yawning staircase the outline of a human figure showed indistinctly.

“One for you,” muttered Jack, and fired.

The figure threw up its arms and fell backwards.

The report of the musket brought Don to his feet. “What's the row?” he asked, running to his companion's side in alarm.

The appearance of other figures in lieu of the first supplied a more pertinent answer to this question than Jack could have given. He snatched up one of the remaining muskets, Jack possessing himself of the other. By this time Spottie and Puggles were also up, but, like the dutiful servants they were, they kept well in the rear of their masters.