Now give him another!" Again the two boys went at it and once more Tom was struck in the shoulder.

Then Lew Flapp aimed for Tom's face, but the latter ducked and, recovering, hit the big boy a heavy blow in the chin that made his teeth rattle and sent him staggering over the side of an upturned boat and flat on his back.
"Hurrah!" cried Sam.

"That was almost a knockout, Tom.

Now give him to understand--" Sam broke off short, as a warning cry from Harry Moss reached his ears.
All eyes turned toward the doorway of the boathouse and a second later George Strong, the head teacher, stepped into view..