I heard, though, the steps of the sentry away to my left, and soon after a faint cough to my right sounded quite loudly. "It wouldn't have done for you to have gone to sleep with me taking your place, for I suppose some officer will be visiting the posts before very long, and then you'd have been found out if I hadn't woke you in time." I said this in a low tone not much above a whisper, in case any one was going the rounds; but he did not take any notice. "It wouldn't have done, you know," I said. There was a low, heavy sighing breath, which made me start in wonder, and then turn towards my companion, to find that his rifle was resting against the stone, and that he had sunk sidewise against another and was fast asleep. "Completely fagged out," I said to myself, with a feeling of pity for him. "He did fight bravely against it; but the drowsiness was too much for him." One moment I felt ready to take hold of his arm and shake him, but I did not. I was there with his rifle ready to my hand, and if I kept his watch, perhaps only for a few minutes, he would wake up again, refreshed and better able to keep it till he was relieved. "It often is so," I said to myself. "One drops asleep after dinner, and then wakes up ready to go for any length of time. It's being a good comrade to the poor fellow," I thought; and, picking up his rifle, I took over his duty just as if it were my own, keeping my eyes wandering over the dark grey stones in front, and sweeping the whole space. Then my breath suddenly felt as if checked in my surprise, for about thirty yards away, as near as I could guess, there was a dark shadow passing one of the great blocks. "Fancy," I said to myself as soon as I could recover from my surprise; and, treating myself as I had treated my fellow-trooper, I mentally declared I had thought about it till I seemed to see it. "It's all imagination," I said again; and then I lowered the rifle I held, a thrill running through me as I distinctly saw the dark shadow again, but nearer than before. This time I was certain it was not imagination. A figure--enemy or no--was cautiously stealing towards our lines! My first impulse was to fire at the figure and give the alarm; but on second thoughts I hesitated to go to such an extreme. Fixing my eyes upon the dark, shadowy form, I cocked my rifle, and called hoarsely upon whoever it was to stop. "Ah! No shoot, no shoot," cried a familiar voice. "Joeboy!" I exclaimed. "Um!" was the reply; and, to my astonishment, the black came hurrying towards me, bending under a load which stuck out curiously from his sides and back. "Why, what have you been doing out there?" "Been get all these," he said as he forced his way between a couple of stones, which caught his bulky load and checked him for a few moments.