"I do not think, señor," Dias said, "that it will be necessary to keep that watch, for, as we knew from the noise when you fired last night, there are numbers of birds and at least one beast—I fancy it is a bear from the sound of its roar—up there, and it would be strange if a number of men making their way down did not disturb some of them; indeed, if one bird gave the alarm, it would put them all in motion; besides, there are certainly monkeys, for I heard their cries and chattering when the birds flew up. Still, it is perhaps as well that one of us should watch. Shall we divide, as we did last night? only, of course, José takes his place with you."
"I quite agree with you, Dias. Bertie, you had better get three hours' sleep at once, and then after dinner we will sit by the fire here, smoke, and listen, and Dias will watch the gorge and keep one ear open in this direction too. It is a comfort to know that if we cannot get away by going up the stream, the Indians cannot get down to attack us from that direction."
Two nights and days passed. The Indians were still on the hills, and once or twice men came down some distance, but a shot from Harry's rifle sent them speedily back again. The third night Bertie was on watch; he saw nothing, but suddenly there came three sharp taps. He discharged one barrel of his gun at random down the ravine, and then held himself ready to fire the other as soon as he saw anyone approaching. It was an anxious minute for him before the other three ran up.
"What is it, Bertie; have you seen anything?"
"No, but three arrows tapped against the wall, so I fired one barrel to call you up, and have been looking out for someone to take a shot at with the other; but I have not seen anyone, though, as you may imagine, I looked out sharply."
"It is probable that after the lesson they got the other night they did not come so near, and that they merely shot their arrows to see if we were still on guard. However, we may as well stay here for a bit to see if anything comes of it."
Nothing happened, however, and they returned to the tents. Next morning Bertie said to his brother:
"Look here, Harry, I have been thinking over that plan of mine. I really think there is something to be done with it."
"Well, tell us your plan."
"In the first place, how much powder can you spare?"