The kick for goal failed.  Then the Navy took the ball and promptly enough the Rustlers came back with it, Jetson carrying.

Dave and Dan met the ball-carrier.  The Rustlers’ support failed, and Jetson went down with the ball.  Nor could the second team advance the ball, so it presently came to the Navy men again.

“I want you to put it through again like a cannon-ball, Darrin,” Midshipman Hepson whispered as they passed.

So the quarter-backs called for a repetition of the play, giving different signals.

Dave received the ball with a rush of his old-time fervor and confidence.  Dan started behind him as full of fire as ever.

In a fraction of a second the impact of the two opposing lines came.  Jetson went down, one of his legs flying between Darrin’s in such a way as to constitute a foul.

Dave Darrin went down on top of the ball.  Half a dozen players sprawled over him.  The referee’s whistle blew.

“Jetson, that was a mean, deliberate trip,” remarked Darrin, as he sprang to his feet.  He spoke coolly, with a warning flash in his eyes.

“Not on my part,” retorted Jetson.

“You thrust your leg between mine as you went down.”

Coach signed to referee not to renew the game for the moment.  Then Lieutenant-Commander Havens and the two team captains crowded close.

“I didn’t do it deliberately, as you charged,” retorted Jetson, hot with anger.

“You deny it?” insisted Dave.

“I do.”

“On your word as a gentleman you did not intend, a foul trip?” demanded Midshipman Darrin.

“I have already answered you.”

“Answer me on your word as a gentleman.”

“I don’t have to.”

“Very good, then,” retorted Dave, turning away with a meaning smile.

“Hold on.  I pledge you my word as a gentleman that I did not intend to make a foul trip,” said Jetson, swiftly realizing the error of his refusal.

In the meantime Lieutenant-Commander Havens had turned to Motley, of the first class, who was serving as referee.

“Mr. Motley,” demanded coach, “did you see just what happened?”

“Yes, sir.”

“Do you call it a foul trip?”

“I do, sir.  If I were referee in a regular game, I would penalize the team and order the player from the field.”

“Mr. Jetson—­” began the coach, but, swift as a flash Dave Darrin interposed, though respectfully, saluting at the same time.

“Will you pardon me, sir.  Mr. Jetson has given me his word that he did not intend a foul trip.  I accept his word without reservation.”

“Very good, then,” nodded coach.  “But Mr. Jetson, you will do well to be careful in the future, and avoid even the appearance of evil.”

“Yes, sir; very good, sir,” answered Jetson, looking decidedly sheepish.

In giving his word Jetson had told the truth, or had intended to.  The exact truth was that he really did not realize what he had done until it was too late to avoid the foul.  He had meant to stop Darrin, somehow.