Again came the signal call, and Ruddy looked toward the gate and then at his master. Clearly it was not Rick whistling, and yet——

"Someone is trying to call Ruddy away!" said Rick in a low voice. "They're trying to fool him. Maybe it's that tramp sailor—the one who was telling Sig about the dog that was washed overboard. Oh, Ruddy! If they take you away from me!"

Once more came the shrill whistle. It seemed to be calling the dog, and Ruddy did not know what to do.

CHAPTER XII
RUDDY IS GONE

Rick dropped his strap of school books that had been swinging around his head as he ran home.

"Come on, Ruddy!" the boy called to his dog. "We'll see who is doing that whistling!"

And by the sharp, short bark the setter gave his master knew that the dog was as ready as he, himself, to find out who was trying to play a trick on them, if anyone was.

"Wait a minute, Rick!" called his mother, as the two friends ran toward the gate. "What was that you said about a tramp sailor?"

Rick repeated what the coast guard had told him.

"Then you'd better be careful how you let Ruddy run loose," went on Mrs. Dalton. "Do you think the sailor is hiding out there now, trying to call Ruddy?"