He thought a moment. "I should like to go aboard the revenue cutter. May I?"
"Surely," agreed Burke.
A few moments later we were on the Uncas, Kennedy and Burke in earnest conversation in low tones which I did not overhear. Evidently Craig was telling him just enough of what he had himself discovered so as to enlist Burke's services.
The captain in charge of the Uncas joined the conversation a few moments later, and then Kennedy took the heavy package down below. For some time he was at work in one of the forward tanks that was full of water, attaching the thing, whatever it was, in such a way that it seemed to form part of the skin of the ship.
Another brief talk with Burke and the captain followed, and then the three returned to the deck.
"Oh, by the way," remarked Burke, as he and Kennedy came back to me, "I forgot to tell you that I have had some of my men working on the case and one of them has just learned that a fellow named Petzka, one of the best wireless operators,—a Hungarian or something—has been engaged to go on that yacht."
"Petzka?" I repeated involuntarily.
"Yes," said Burke, in surprise, "do you know anything about him?"
I turned to Kennedy.
"Not much," replied Craig. "But you can find out about him, I think, through his wife. He used to be one of my students. Here's her address. She's very anxious to hear from him. I'm sure that if you have any news she will be only too glad to receive it."