He picked up a small object that lay at the foot of the incline, in the glare of the sunlight that streamed in from above.
“That’s Bob’s knife,” said Jerry. “He had it yesterday. That shows he must have been here since. There is no doubt but that they have carried him away from here.”
The professor agreed that this was probably the case. There was nothing left to do, so they returned to the temple.
“I hardly know what to do,” said the naturalist. “We might take the automobile and ride off, not knowing where, in a vain endeavor to find Bob. Or we can stay here on the chance that he may escape and come back. If we went away he would not know where to find us.
“Then, too, I am hopeful we may hear something from Noddy Nixon or some of those Mexicans he had with him. Those fellows are regular brigands, and may have captured Bob, thinking we will pay a ransom for his return. On the whole, I think we had better stay here for a few days.”
This seemed the best thing to do. With heavy hearts, Jerry and Ned wandered about the old temple, wishing their chum was back with them. The professor began to gather more specimens and made several trips to the old buildings where he got many curios of value.
Meanwhile, poor Bob was having his own troubles. At the first rough attack of the kidnappers, when he was hauled over the back of the auto, he did not know what had happened. He supposed it was some accident, such as the tunnel caving in or the water suddenly rising.
But when he found himself held by two men, and the bag thrown over his head, he realized that he was a captive, though he did not know why any one would want him.
Holding him between them, Vasco and Dalsett ran back into the bath and up the incline, followed by Noddy and the Mexicans. Berry and Pender had been left in charge of the auto and horses, which were in the first tunnel.
Bob, who had not attempted to struggle after his first involuntary kicking when he was hauled out, decided that his captors were having too easy a time of it. He was by no means a baby, and though he was fat he had considerable muscle.