As he ran quickly over in his mind the list of those who would come under the head of suspicion, he put them aside, one after another. It was certainly not Lef Seller or Bill Klemm; another look, and he was just as positive that it could not be either Asa Barnes or Tony Gilpin. Perhaps, after all, this cunning spy might be some enthusiast from Clifford, who, believing that his team had suffered through treachery on the preceding Saturday, when Bellport overwhelmed them, wished to even matters by picking up Columbia's signals. "As if two wrongs ever yet made a right," said Frank bitterly, as he continued to chase after the unknown. He was gaining rapidly. Still, in order to do so, he had to keep his eyes fixed for the most part on the moving figure ahead, and in this way was unable to properly watch his footsteps. Consequently, it was not at all surprising when he suddenly stepped on a stick that broke with a sharp twang. And, before he could dodge behind a tree, the fellow beyond had turned his head. Frank knew instantly that he was discovered. He had stood perfectly still, in the hope that he might escape observation; but when he saw the other take to his heels, he realized that it was now destined to be a stern chase. So he, too, started to run at top speed, which meant a hot pace, since Frank was something of a sprinter on the cinder path. At least, that turn on the part of the other had told him one thing--it was no Columbia fellow who had played this miserable trick upon the football squad; so undoubtedly he must belong in Clifford. Despite the efforts of the school authorities, there was always more or less laying of wagers on these games. Driven away from the racetracks by recent strict State legislation, it seemed that those who made books were seeking all manner of sports, in order to carry on their games of chance. So Frank consoled himself in the belief that this might be some agent of these gamesters, rather than a Clifford schoolboy intending to take a mean advantage of the rival team. He was outrunning the fugitive, and it looked as though, if the chase were continued five minutes more, Frank was sure to overtake him. Then the road leading north toward the river was reached. To Frank's disgust, he saw the other drag a bicycle out of some bushes, and, while he made a swift rush, hoping to yet come upon the fellow before he got away, it was only to see his intended quarry spin off along the road. Frank followed a short distance, still cherishing a faint hope that something might happen to upset the other, but gradually the figure of the fleeing spy began to vanish, and he had to give it up. The last he heard from the fellow was a sharp howl of derision. Evidently his sudden coming on the scene had given the coward a great scare, and he was now rejoicing over his narrow escape.