“What do you think of it?” demanded Alex.
“I don’t think!” admitted Case. “I’ve lost the power of thought!”
“But what did they throw it back here for?” insisted Alex.
“Why did who throw it back here?” chuckled Case.
“Now, look here, Smarty,” Alex. continued. “There are only four persons who could have taken that bag from the boat, the cashier and his two friends, and Chet.”
“Unless the dog ate it, or Teddy threw it overboard.”
“Oh, quit your foolishness! Now, which one of the four is out there in the river? Whoever it is has a sense of humor, for the tossing of the bag back shows that the situation is appreciated.”
“You notice the steamer came UP the river?” asked Case.
“Yes; what of it?” demanded Alex. “I don’t see anything in that.”
“Well, that shows that whoever threw the bag on deck came from down stream! It shows, too, that we have been watched every minute, for reasons which we don’t know anything about!”