When he got within fifty yards of them, he put the revolver in his pocket, turned round, and beckoned to Manuel and the others to come on.

He knew now why these men remained so strangely motionless. They were dead. They had been dead for a long time, possibly for years; the cold and the rarefied air had preserved their bodies, their mummified hands were intact, all the flesh of their faces that one could see beneath the broad-brimmed hats was free from any sign of decomposition. Dyke, looking sadly down at one of them, judged him, by the grizzled hair upon his chin and the deep wrinkles at each side of the mouth, to have been a man of over fifty years of age, and noticed how the sun had obliterated the colour of the once scarlet shawl that was bound about his waist, and faded the brown leather of his belt and pouches. With gentle reverent hands he raised the soft brim of the hat, and looked at the whole face.

Then he started back in horror and disgust. Not the faintest suspicion of the truth had come to him till the lifted hat disclosed the nose, the eyes, the forehead; and all the features, swiftly assembled, flashed into a long familiar mask. It was his old comrade, Pedro del Sarto.

He sprang to the other body, and took it roughly by the shoulder. It fell over sideways, queerly and lightly, like a thing made of basket-work and hooped steel, and lay there with its hands still clasping its knees, in the frozen attitude that could not change. But the hat had rolled away, and Dyke saw the face that he had expected to see. It was Juan Pombal, del Sarto’s underling and constant associate.

Dyke went back to the other body, knelt by it, and searched it. There was no weapon of any kind; there was no food in a wallet on the ground; but in the belt pouches he found dollar notes, a small pocket book, and some papers—amongst them, tattered and stained, the map that he himself had given to Pedro at Buenos Ayres over two years ago.

Manuel and his fellow Argentines had gathered round; they were gesticulating, chattering, asking each other questions; while they feasted their curiosity in scrutinising the dead men. How had they come here, whence, why? The four Indians stood where the mules had been left and would approach no nearer.

Dyke, going to Emmie, told her the nature of the discovery he had made. He understood at once all that it implied. His comrade, his friend, the man he trusted as a brother, had played him false, had tried to cheat him, and in making the attempt had thus miserably met with disaster. No other explanation was possible. Pedro, falling into low water, as people reported at Buenos Ayres, had yielded to the temptation offered by a chance. He knew that the friend he was betraying would not return for a year and a half at least; there would be plenty of time to come up here, put his dirty hands in the pocket of treasure, and get safely away. As to facing Dyke afterwards, he probably made no plans; he left the future to take care of itself.

“And I loved him, Emmie,” said Dyke bitterly. “I loved that man.”

But Pedro and Pombal did not venture to come here alone. No, obviously, they must have brought mules and muleteers with them; they fitted themselves out much as Dyke had done, although in more meagre style, before they risked themselves in the wilderness. What had happened to their hireling followers?

The bitterness passed from Dyke’s tone, as little by little he reconstructed the horrible details of the tragedy. Their muleteers had deserted them. But why? Perhaps Pedro bullied the men, drove them too hard, or fed them badly. Or the men took fright, thinking their provisions might give out. Something had frightened them, and they had consummated the hideous deed. The betrayers had themselves been betrayed.