Much as he wished to think otherwise, Captain Horn could not prevail upon himself to believe that Ralph could have written such a letter after a dishonorable and reckless visit to the mound.
It was possible that one or both of the negroes had discovered the mound, but it was difficult to believe that they would have dared to venture into that awful cavern, even if the vigilance of Edna, Mrs. Cliff, and the boy had given them an opportunity, and Edna had written that the two men had always slept outside the caves, and had had no call to enter them. Furthermore, if Cheditafa had found the treasure, why should he keep it a secret? He would most probably have considered it an original discovery, and would have spoken of it to the others. Why should he be willing that they should all go away and leave so much wealth behind them? The chief danger, in case Cheditafa had found the treasure, was that he would talk about it in Mexico or the United States. But, in spite of the hazards to which such disclosures might expose his fortunes, the captain would have preferred that the black men should have been pilferers than that other men should have been discoverers. But who else could have discovered it? Who could have been there? Who could have gone away?
There was but one reasonable supposition, and that was that one or more of the Rackbirds, who had been away from their camp at the time when their fellow-miscreants were swept away by the flood, had come back, and in searching for their comrades, or some traces of them, had made their way to the caves. It was quite possible, and further it was quite probable, that the man or men who had found that mound might still be here or in the neighborhood. As soon as this idea came into the mind of the captain, he prepared for action. This was a question which must be resolved if he could do it, and without loss of time. Lighting his lantern,—for in that black darkness it was impossible for him to find his way without it, although it might make him a mark for some concealed foe,—the captain quickly made his way out of the lake cavern, and, leaving his lantern near the little wall, he proceeded, with a loaded pistol in his hand, to make an examination of the caves which he and his party had occupied.
He had already looked into the first compartment, but stopping at the pallet which lay almost at the passage of the doorway, he stood and regarded it. Then he stepped over it, and looked around the little room. The pallet of blankets and rugs which Ralph had used was not there. Then the captain stepped into the next room, and, to his surprise, he found this as bare of everything as if it had never been used as a sleeping-apartment. He now hurried back to the first room, and examined the pallet, which, when he had first been looking at it, he had thought to be somewhat different from what it had been when he had used it. He now found that it was composed of all the rugs and blankets which had previously made up the beds of all the party. The captain ground his teeth.
"There can be no doubt of it," he said. "Some one has been here since they left, and has slept in these caves."
At this moment he remembered the innermost cave, the large compartment which was roofless, and which, in his excitement, he had forgotten. Perhaps the man who slept on the pallet was in there at this minute. How reckless he had been! To what danger he had exposed himself! With his pistol cocked, the captain advanced cautiously toward the innermost compartment. Putting his head in at the doorway, he glanced up, down, and around. He called out, "Who's here?" and then he entered, and looked around, and behind each of the massive pieces of rock with which the floor was strewn. No one answered, and he saw no one. But he saw something which made him stare.
On the ground, at one side of the entrance to this compartment, were five or six pieces of rock about a foot high, placed in a small circle so that their tops came near enough together to support a tin kettle which was resting upon them. Under the kettle, in the centre of the rocks, was a pile of burnt leaves and sticks.
"Here he has cooked his meals," said the captain—for the pallet made up of all the others had convinced him that it had been one man who had been here after his party had left. "He stayed long enough to cook his meals and sleep," thought the captain. "I'll look into this provision business." Passing through the other rooms, he went to a deep niche in the wall of the entrance passage where his party had kept their stores, and where Edna had written him they had left provisions enough for the immediate use of himself and the men who should return. Here he found tin cans tumbled about at the bottom of the niche, and every one of them absolutely empty. On a little ledge stood a tin box in which they had kept the matches and candles. The box was open, but there was nothing in it. On the floor near by was a tin biscuit-box, crushed nearly flat, as if some one had stamped upon it.
"He has eaten everything that was left," said the captain, "and he has been starved out. Very likely, too, he got out of water, for, of course, those pools would dry up, and it is not likely he found the stream outside."
Now the captain let down the hammer of his revolver, and put it in his belt. He felt sure that the man was not here. Being out of provisions, he had to go away, but where he had gone to was useless to conjecture. Of another thing the captain was now convinced: the intruder had not been a Rackbird, for, while waiting for the disappearance of the Chilian schooner, he had gone over to the concealed storehouse of the bandits, and had found it just as he had left it on his last visit, with a considerable quantity of stores remaining in it. If the man had known of the Rackbirds' camp and this storehouse, it would not have been necessary for him to consume every crumb and vestige of food which had been left in these caves.