The alarm being given, we locked our cabin doors, repaired to the smoking-room, and ordered drinks at a center table where no eavesdropper could overhear.

"It's one of two things," said Monty. He had his folding board out, and we did not doubt he would play chess from there to London. "Either they know exactly where that ivory is, or they haven't the slightest idea."

"My, but you're wise!" said Will.

Monty ignored him. "They suspect us of knowing. They mean to prevent our getting any of it. If they do know, they've some reason of their own for not getting it themselves at present. If they don't know, they suspect we know and intend to claim what we find."

"How should they think we know?" objected Will. "The first we ever heard of the stuff was in the lazaretto in Zanzibar."

"True. Juma told us. Juma probably told them that we told him. Natives often put the cart before the horse without the slightest intention of lying."

"All the same, why should they believe him?"

"Why not? Zanzibar's agog with the story—after all these years. The ivory must have been buried more than a quarter of a century ago. Some one's been stirring the mud. We arrive, unexpectedly from nowhere, ask questions about the ivory, make plans for British East Africa—and there you are! The people who were merely determined to get the stuff jump to the false conclusion that we really know where it is.''

"Q. E. D.!" said Fred, finishing his drink.

"Not at all," said Monty. "There are two things yet to be demonstrated. They're true, but not proven. The German government is after the stuff. And the German government has very special reasons for secrecy and tricks."