He could not make out for certain from where he stood, but he felt almost certain that this was the case, and that Sim was occupying the most important outpost of the little fort. With his heart beating wildly he crept back to the place where the men lay asleep, and going on tiptoe from one to the other, he satisfied himself by the dim light of the lamp swinging from the roof that Private Sim was not there. "It was utter madness," he muttered to himself. "Lund should have known," and in his excitement he recalled to mind the night when he had found him asleep. He remembered, too, what a fearful night that was, and he felt that this might prove to be just as dangerous, as he hurried back, catching up his rifle and pouch as he went, and then going quietly along to where Private Sim was stationed. It was undoubtedly the weakest spot about the fort, and in place of one untrustworthy man, two of the most trusty should have been stationed there. By some error of judgment, however, this was not done, and Private Sim held the lives of all in the little fort within his hand. Gray thought that after all he might be misjudging him, and therefore he went on cautiously, listening as he stopped from time to time, and expecting to be challenged; but there was no sound to be heard, and as Gray went closer it seemed to him as if no sentry had been placed there. But as he went nearer there was no error of judgment upon his part. It was as he suspected. Private Sim was seated on the ground, his rifle across his lap, fast asleep, and quite oblivious of the fact that his messmate stood close beside him, panting with rage and disgust. "You scoundrel!" he cried in a low, passionate voice. "Do you not know that the punishment may be death for sleeping at a time like this?" As he spoke he struck the sleeper heavily upon the head with the butt of his rifle, and Sim started up and grappled with him, just as a dozen Malays sprang out of the darkness, and made at the defence between them. The struggle between the two was but brief, for Gray threw Sim off, and brought his bayonet to bear against the Malays, forgetting in his excitement to load and fire, so that it was Sim's rifle that gave the alarm. For the next few minutes the two men fought side by side, their bayonets keeping the Malays back every time they strove to enter the place, and driving them off successfully till help came, and two or three volleys did the rest. "How was this? How did it happen that you did not see the enemy approaching sooner, Private Sim?" said Captain Smithers, sternly. Sim trembled for his life, knowing as he did that over matters of discipline the captain was a stern man, and that he must expect no mercy for his fault if Gray spoke out, and told all he knew; so he exclaimed hastily, and with a malicious look at Gray,-- "How could I, sir, when there are traitors in the camp?" "Traitors! What do you mean?"