The big Boer nodded to Jack, and stalked out of the vault.

For a few moments Jack faced unflinchingly the six men who remained, wondering whether, now that their commandant had gone, they would shoot him or injure him in any way. But with a few muttered oaths and sneering remarks as to what would happen to him on the morrow, they turned away, Piet Maartens giving orders that he should be bound with a rope.

Five minutes later Jack was tied hand and foot, and placed upon the concrete flooring with his back resting against a wheel of one of the trucks. From here he watched his captors, who had retired into the shed. Placing their lanterns on the ground, they wrapped themselves in blankets, and, leaving one of their number seated on a stool, threw themselves down to sleep.

“I’m in a nasty hole,” thought Jack, “a very awkward fix indeed. If it had not been for Oom Schalk those brutes would certainly have shot me; and I’m not at all sure that they won’t do so after all, for there is no one to prove that I am telling the truth. Even if they don’t harm me, they are bound to get rid of me, for they can never allow me to remain in the Transvaal after this. Well, I must get away somehow.”

For half an hour he sat quietly thinking, with his eyes fixed upon the lanterns and upon the figure sitting close to them. The Boer had lit his pipe, but it constantly went out, and he as constantly lifted a lantern to get a light again. Then he put it on the ground, folded his arms, and stared about him. Soon his head drooped, and nodded gently, then his chin went down on his chest with a jerk, and he sat upright again, shrugged his burly shoulders, yawned, and looked about him. Jack watched him with deep interest, and soon saw that he had fallen asleep.

Now was his time, and noiselessly bringing his heels close beneath him, he gave his body a jerk forward by pressing against the truck with the back of his head, and in another moment was standing on his feet.

He was still helpless, for he was firmly bound, with his hands behind his back. But he had not been racking his brains all this time for nothing. He remembered that at Durban he had noticed that the corners of the iron trucks were not turned over, but bolted to angle-irons inside, leaving a more or less rough surface at the edge. It was a small matter, but he had noticed it just as one does take note of trivial points, and he now determined to put it to a good purpose. Inch by inch he shuffled along till he reached the corner of the truck against which he had been placed, then he leant against it, and commenced to rub the cords which bound his wrists up and down the roughened edge.

It was difficult work, but he clenched his teeth and put all his strength into it. After more than half an hour’s nibbing the cord was cut through and his hands were free. To release his legs was now a simple matter, and in a few minutes he was standing close to the truck, with his boots off, and slung across his shoulders by the laces. Then he undid his secret pocket, pressed the spring, and gripped the butt of his Mauser pistol.

At this moment there was a sound from the shed, and on looking in that direction Jack noticed that the sleepy sentry was half-awake once more, and was making a desperate effort to stand upon his feet. He yawned several times, shook himself, rubbed his eyes, and then suddenly turned and looked towards the trucks.