rival concern in New York has been keeping track of Mr. Period's movements. Probably they have a paid spy who may be in his employ. They knew when he sent you a telegram, what it contained, and where it was directed to. Then, of course, they knew you would call here for it. What they did not know was when you would come, and so they had to wait. That one spy was on guard, and, as soon as you came, he went and summoned Eckert, who was waiting somewhere in the neighborhood."
"Bless my detective story!" cried Mr. Damon. "What a state of affairs! They ought to be arrested, Tom."
"It would be useless," said Mr. Nestor. "They are probably far enough away by this time. Or else they have put others on Tom's track."
"I'll fight my own battles!" exclaimed the young inventor. "I don't go much on the police in a case like this, especially foreign police. Well, my camera is all right, so far," he went on, as he took a look at it, in the compartment where he kept it. "Some one must always remain near it, after this. But we'll soon start for Africa, to get some pictures of a native battle. I hope it isn't the red pygmies we have to photograph."
"Bless my shoe laces! Don't suggest such a thing," begged Mr. Damon, as he recalled the
