"You'd expect it might be some one out on the lake; can you see any small boat in sight, Andy; or any one waving back from another point?"
"Not a thing, as far as I can see," replied the boy with the marine glasses.
"Suppose you try the steamer, then," suggested Frank, meaningly.
Immediately Andy gave an exclamation of astonishment.
"I see a signal moving, Frank, and it seems to be copying the one on shore," he hastened to remark, excitedly.
"Where does it come from, the passengers that I saw pushing up against the rail, and staring at us; are any of them interested, do you think?" continued Frank, who just then could not turn his head to look, but must depend on his chum.
"Well, no," answered Andy, "it seems to come from the pilothouse, and must be Todd Pemberton, himself."