captain horn, his face red with exertion and excitement, stood gazing down into the square aperture at his feet. on the other edge of the opening knelt ralph, holding the lantern so that it would throw its light into the hole. in a moment, before the boy had time to form a question, he was pushed gently to one side, and his sister edna, who had clambered up the side of the mound, knelt beside him. she peered down into the depths beneath, and then she drew back and looked up at the captain. his whole soul was in his downward gaze, and he did not even see her.

then there came a voice from below. "what is it?" cried mrs. cliff. "what are you all looking at! do tell me."

with half-shut eyes, edna let herself down the side of the mound, and when her feet touched the ground, she made a few tottering steps toward mrs. cliff, and placing her two hands on her companion's shoulders, she whispered, "i thought it was. it is gold! it is the gold of the incas." and then she sank senseless at the feet of the older woman.

mrs. cliff did not know that miss markham had fainted. she simply stood still and exclaimed, "gold! what does it mean?"

"what is it all about?" exclaimed ralph. "it looks like petrified honey.

this never could have been a beehive."

without answering, captain horn knelt at the edge of the aperture, and taking the lantern from the boy, he let it down as far as it would go, which was only a foot or two.

"ralph," he said hoarsely, as he drew himself back, "hold this lantern and get down out of my way. i must cover this up, quick." and seizing the stone slab by the handle, he lifted it as if it had been a pot-lid, and let it down into its place. "now," said he, "get down, and let us all go away from this place. those negroes may be back at any moment."

when ralph found that his sister had fainted, and that mrs. cliff did not know it, there was a little commotion at the foot of the mound. but some water in a pool near by soon revived edna, and in ten minutes the party was on the plateau outside the caverns. the new moon was just beginning to peep over the rocks behind them, and the two ladies had seated themselves on the ground. ralph was pouring out question after question, to which nobody paid any attention, and captain horn, his hands thrust into his pockets, walked backward and forward, his face flushed and his breath coming heavily, and, with his eyes upon the ground, he seemed to think himself entirely alone among those desolate crags.

"can any of you tell me what it means?" cried mrs. cliff. "edna, do you understand it? tell me quickly, some of you!"

"i believe i know what it means," said edna, her voice trembling as she spoke. "i thought i knew as soon as i heard of the mound covered up by the lake, but i did not dare to say anything, because if my opinion should be correct it would be so wonderful, so astounding, my mind could hardly take hold of it."

"but what is it?" cried mrs. cliff and ralph, almost in one breath.

"i scarcely know what to say," said edna, "my mind is in such a whirl about it, but i will tell you something of what i have read of the ancient history of peru, and then you will understand my fancies about this stone mound. when the spaniards, under pizarro, came to this country, their main object, as we all know, was booty. they especially wished to get hold of the wonderful treasures of the incas, the ancient rulers of peru. this was the reason of almost all the cruelties and wickedness of the invaders. the incas tried various ways of preserving their treasures from the clutch of the spaniards, and i have read of a tradition that they drained a lake, probably near cuzco, the ancient capital, and made a strong cellar, or mound, at the bottom of it in which to hide their gold. they then let the water in again, and the tradition also says that this mound has never been discovered."

"do you believe," cried the captain, "that the mound back there in the cavern is the place where the incas stored their gold?"

"i do not believe it is the place i read about," said miss markham, "for that, as i said, must have been near cuzco. but there is no reason why there should not have been other places of concealment. this was far away from the capital, but that would make the treasure so much the safer. the spaniards would never have thought of going to such a lonely, deserted place as this, and the incas would not have spared any time or trouble necessary to securely hide their treasures."

"if you are right," cried the captain, "this is, indeed, astounding! treasure in a mound of stone—a mound covered by water, which could be let off! the whole shut up in a cave which must have originally been as dark as pitch! when we come to think of it," he continued excitedly, "it is an amazing hiding-place, no matter what was put into the mound."

"and do you mean," almost screamed mrs. cliff, "that that stone thing down there is filled with the wealth of the incas!—the fabulous gold we read about?"

"i do not know what else it can be," replied edna. "what i saw when i looked down into the hole was surely gold."

"yes," said the captain, "it was gold—gold in small bars."

"why didn't you get a piece, captain?" asked ralph. "then we could be sure about it. if that thing is nearly filled, there must be tons of it."

"i did not think," said the captain. "i could not think. i was afraid somebody would come."

"and now tell me this," cried mrs. cliff. "whom does this gold belong to?

that is what i want to know. whose is if?"

"come, come!" said the captain, "let us stop talking about this thing, and thinking about it. we shall all be maniacs if we don't quiet ourselves a little, and, besides, it cannot be long before those black fellows come back, and we do not want to be speaking about it then. to-morrow we will examine the mound and see what it is we have discovered. in the meantime, let us quiet our minds and get a good night's sleep, if we can. this whole affair is astounding, but we must not let it make us crazy before we understand it."

miss markham was a young woman very capable of controlling herself. it was true she had been more affected in consequence of the opening of the mound than any of the others, but that was because she understood, or thought she understood, what the discovery meant, and to the others it was something which at first they could not appreciate. now she saw the good common sense of the captain's remarks, and said no more that evening on the subject of the stone mound.

but mrs. cliff and ralph could not be quiet. they must talk, and as the captain walked away that they might not speak to him, they talked to each other.

it was nearly an hour after this that captain horn, standing on the outer end of the plateau, saw some black dots moving on the moonlit beach. they moved very slowly, and it was a long time—at least, it seemed so to the captain—before maka and his companions reached the plateau.

the negroes were heavily loaded with bags and packages, and they were glad to deposit their burdens on the ground.

"hi!" cried the captain, who spoke as if he had been drinking champagne, "you brought a good cargo, maka, and now don't let us hear any tales of what you have seen until we have had supper—supper for everybody. you know what you have got, maka. let us have the best things, and let every one of you take a hand in making a fire and cooking. what we want is a first-class feast."

"i got 'em," said maka, who understood english a good deal better than he could speak it,—"ham, cheese, lots things. all want supper—good supper."

while the meal was being prepared, captain horn walked over to mrs. cliff and ralph. "now, i beg of you," he said, "don't let these men know we have found anything. this is a very important matter. don't talk about it, and if you can't keep down your excitement, let them think it is the prospect of good victuals, and plenty of them, that has excited you."

after supper maka and cheditafa were called upon to tell their story, but they said very little. they had gone to the place where the rackbirds had kept their stores, and had selected what maka considered would be most desirable, including some oil for the lantern, and had brought away as much as they could carry. this was all.

when the rest of his party had gone inside, hoping to get their minds quiet enough to sleep, and the captain was preparing to follow them, maka arose from the spot on the open plateau where the tired negroes had stretched themselves for the night, and said:

"got something tell you alone. come out here."

when the two had gone to a spot a little distance from the cavern entrance, where the light of the moon, now nearly set, enabled objects to be seen with some distinctness, maka took from inside his shirt a small piece of clothing. "look here," said he. "this belong to davis."

the captain took the garment in his hand. it was a waistcoat made of

plaid cloth, yellow, green, and red, and most striking in pattern, and

captain horn instantly recognized it as the waistcoat of davis, the

englishman.

"he dead," said maka, simply.

the captain nodded. he had no doubt of it.

"where did you find it?" he asked.

"sticking on rock," said the african. "lots things down there. some one place, some another place. didn't know other things, but know this. davis' waistcoat. no mistake that. him wear it all time."

"you are a good fellow, maka," said the captain, "not to speak of this before the ladies. now go and sleep. there is no need of a guard to-night."

the captain went inside, procured his gun, and seated himself outside, with his back against a rock. there he sat all night, without once closing his eyes. he was not afraid that anything would come to molest them, but it was just as well to have the gun. as for sleeping, that was impossible. he had heard and seen too much that day.