"Dias is waiting there. Will you come down?" the latter said. "You were sleeping like a top; I had to pull at your leg three times before you woke."

"I am coming," Harry said as he crawled out. "I feel more sleepy than when I lay down, and will just run down to the stream and sluice my head, that will wake me up in earnest, for the water is almost as cold as ice."

When he came back he was joined by Donna Maria, and, taking both his shot-gun and rifle, he went forward with her to the barricade.

"So you have neither seen nor heard anything, Dias?"

"Nothing whatever, senor."

"I have had a good sleep, Dias; we will watch for the next four hours.

It is eleven o'clock now, so you will be able at three to take it on till daylight."

"I will send and call you again an hour before that," Dias said. "If they attack, as I expect they will as soon as the dawn breaks, we had better have our whole force ready to meet them."

So saying Dias went off.

"This is scarcely woman's work, Donna Maria."

"It is woman's work to help defend her life, senor, as long as she can.

If I found that the savages were beating us I should stab myself. They would kill you, but they might carry me away with them, which would be a thousand times worse than death."

"I don't think there is any fear of their beating us," Harry said; "certainly not here. We ought properly to be one on each side, but really I shirk the thought of wading through the river waist-deep at that shallow place we found a hundred yards up; it would be bad enough to go through it, worse still to lie for four hours in wet clothes."

"Besides, we could not talk then, senor," Maria said will a little laugh, "and that would be very dull."

"Very dull. Even now we must only talk occasionally; we shall have to keep our eyes and ears open."

"I don't think either of them will be much good," she aid; "I can see the white water but nothing else, and I am sure I could not hear a naked footstep on the rocks."

"It is a good thing the water is white, because we can make out the rocks that rise above the surface. When our eyes get quite accustomed to the dark we should certainly be able to see any figures stepping upon them or wading in the water."

"I could see that now, senor. I think it will be of advantage to talk, for I am sure if I were to lie with my eyes straining, and thinking of nothing else, they would soon begin to close."

Talking occasionally in low tones, but keeping up a vigilant watch, they were altogether hidden from the view of anyone coming up the stream, for they exposed only their eyes and the top of their heads above the rough parapet. No attempt had been made to fill up the s.p.a.ces between the stones, so that, except for the rounded shape, it would be next to impossible to make them out between the rough rocks of the crest. Harry had laid his double-barrelled gun on the parapet in front of him. He had loaded both barrels with buck-shot, feeling that in the darkness he was far more likely to do execution with that weapon than with a rifle.

They had been some two hours on watch when Donna Maria touched his arm significantly. He gazed earnestly but could see nothing. A minute later, however, a rock about fifteen yards away seemed to change its shape. Before, it had been pointed, but just on one side of the top there was now a bulge.

"Do you see them?" Maria whispered. "I can make out one above the rocks; the other is standing against the wall."

[Ill.u.s.tration: AN INDIAN SPIES THE EXPEDITION.]

There was no movement for two or three minutes, and Harry had no doubt that they were examining the two black lines of stones between which the water was rushing.

"There are two others on this side, senor," Maria whispered.

The pause was broken by the sharp tap of two arrows striking on the stones a few inches below their heads.

"Well, you have begun it," Harry muttered.

He had already sighted his gun at the head half-hidden by the rock. He now pulled the trigger, and then, turning, he fired the other barrel, aiming along the side of the canon where the two men seen by his companion must be standing. The head disappeared, and loud cries broke from the other side. The stillness that had reigned in the valley was broken by a chorus of shrieks and roars, and the air overhead thrilled with the sound of innumerable wings. Harry on firing had laid down the fowling-piece and s.n.a.t.c.hed up his rifle.

"Do you see any others?"

"Two have run away; the one against the rocks on the other side was wounded, for I saw him throw up his arms, and it was he who screamed.

The man by him dropped where he stood; the one behind the rock is killed, I saw his body carried away in the white water."

Half a minute later Dias and Bertie came up.

"So they have come, senor?"

"Yes, there were four of them. Your wife saw them, though I could only make out one. They shot two arrows at us, and I answered them. The man I saw was killed, and Donna Maria said that one on the other side also fell, and another was wounded."

"That was a good beginning," Dias said. "After such a lesson they will attempt nothing more to-night, and I doubt whether they will come down in the morning. They can get sight of the barricades from that bend a hundred yards down, and I don't think they will dare come up when they see how ready we are for them."

"Well, we will work out our watch anyhow, Dias. Now that I see how sharp Donna Maria's eyes are I have not the least fear of being surprised."

"I will stop with you," Bertie said; "I shall have no chance of going off to sleep again after being wakened up like that."

"If you are going to stop, Bertie, you had better go back and fetch a blanket, it is chilly here; then if you like you can doze off again till your watch comes."

"There is no fear of that, Harry. I have been eight-and-forty hours on deck more than once. I will warrant myself not to go to sleep."

In spite of this, however, in less than ten minutes after his return Bertie's regular breathing showed that he was sound asleep. Harry and Maria continued their watch, but no longer with the same intentness as before. They were sure that Dias would not have lain down unless he felt perfectly certain that the Chincas would make no fresh move until the morning, and they chatted gaily until, at two o'clock, Dias came up.

"Everything is quiet here, Dias. My brother is fast asleep, but I will wake him now that you have come up."

"Do not do so, senor; he worked very hard building the walls today. If I see anything suspicious I will rouse him. We may have work tomorrow, and it is much better that he should sleep on."

"Thank you, Dias! the fatigue has told on him more than on us; his figure is not set yet, and he feels it more."

He walked back to the tents with Maria.

"If you wake just as daylight breaks please rouse me," he said.

"I shall wake, senor; I generally get up at daybreak. That is the best time for work down in the plain, and I generally contrive to get everything done before breakfast at seven."

Harry slept soundly until he was called.

"The sky is just beginning to get light, senor."

He turned out at once. Jose was already feeding the mules.

"You had better come along with me, Jose, and bring that gun of yours with you. If the savages do attack, it will be well to make a forcible impression on them."

Greatly pleased with the permission, Jose took up the old musket he carried and accompanied Harry.

"What have you got in that gun, Jose?"