Frank Roscoe's Secret

It is a mystery and detective book. Sandy promised; and then the gong rang and the boys and girls hurried into the school. All that morning Bart was wondering what Sandy had to tell him. That it had to do with the dinner the nine intended to hold was his belief, but he did not see how the first-year lads had found out about it so soon. Up by the Riffles, of course, the 'Riffles' being a place in the Still river where the boys frequently congregated. Near the Riffles, which were a series of shallow places in the stream, was the swimming hole and a little further up was a good place to fish.