To keep spectators away from the field, several dozen boys had
volunteered to patrol the neighborhood, completely surrounding the
open. Thus it would seem that there could be no one close enough
to overhear when the signal numbers were deliberately called by
the captain.

"Still, I'm under the impression that there may be someone hidden
in those bushes, or in a hollow tree, watching our work, and
drinking in all we say. When fellows descend to such low practices
as betraying their schoolmates to the enemy, they become very
crafty. On the whole, it will be better to change the code just
before the game to-morrow," remarked the coach, later on, during
another rest.

Frank said no more. Secretly, however, he was planning to find
out, if it could be possible, that this idea of Mr. Willoughby had
reason back of it. In other words, he had made up his mind that
when the crowd of players went back to town, he would find some
opportunity to drop behind, and keep watch over that field.

For the third and last time, play was resumed. Again did the coach
follow the carefully arranged maneuvers. Up to the present he had
found it necessary to stop them in the midst of the play to start
afresh, because of some inaccuracy. Not once did this occur now.

"Well, sir, how was that?" asked Frank, as, with disheveled hair
and soiled clothes, he came out of the fracas and sought the side
of the man who knew.

There was hardly any need to ask. Coach Willoughby's bronzed face