The Indian explained that Machado and the General had conversed in low tones while on the yacht, arousing his suspicion. He told how he had prevented the man from carrying out his intention when the Señor's back was turned. Will caught Machado's arm, and he winced.

"Tie him up," said Will. "He shan't have another chance."

Machado was bound and laid beside the General. Food was distributed, but sparingly; the supply brought from Bolivar would soon be exhausted. Then they sat down to wait for daylight, not daring to sleep, in case danger in the shape of beast or man should come. They heard the train rumbling along to their left, until by and by the sound died away.

The dawn stole upon them. They all presented a sorry and woe-begone appearance, none more than General Carabaño. When captured he was wearing a long flowered dressing-gown, the colours of which had "run" through his immersion in the lake. He had lost the well-fed and arrogant look which he habitually wore. He made no further protest, but accepted in sullen silence the meagre portion of food allotted to him, and meekly allowed his arms to be rebound when the brief meal was finished.

Will and Ruggles lost no time in making an examination of the hydroplane. They found that a sharp branch of a submerged tree had penetrated the bottom and pierced the petrol-tank, where it had snapped off. The pressure which usually fed the petrol up to the engine had forced it out of the tank, and Will realized with despair that the hydroplane was now of no more use to them than a raft. All the petrol that was left was about a gallon in one of the cans.

"We are clean done, Ruggles," he said. "There's not the ghost of a chance of our getting to Bolivar."

"Except at three miles an hour," said Ruggles.

"With the river closely watched, as it will be, we can't even drift down. Espejo will know we can't have passed. No one but a madman would attempt to go at any pace in the dark, and then he'd come to grief. I was a fool not to take your advice."

"It's no good crying over spilt milk, as the Chief would say. I can manage to patch up the hole, if that's any good."

"Well, it would keep the thing afloat, but that won't help us much. Without petrol we're stuck."