"There, he's still working away!" snapped Joel, indignantly; "I caught another flash when he moved his glasses. The sun chances to shine in just the right quarter to make that flash each time. I only hope the skunk will stay there till we can get him, that's all." Joel looked so extremely pugnacious when saying this that Jack knew he must be making up his mind just what sort of corporeal punishment best fitted the crime of playing the spy on rivals in football, in order to obtain an unfair advantage over them and taking a game by trickery. "Now, just duck down, and we'll be off," Jack told his companion. He had sized the situation up correctly, Joel saw. There was excellent cover running around to the patch of trees among which the object of their solicitude was placed. It would be an easy matter for two such agile lads to bend over and cover that short distance, all the while keeping themselves hidden from the eyes of the party perched amidst the dead leaves of that oak. It was real exciting work, too, for they fully anticipated having some trouble in making the spy come down after they arrived under the tree in which he was so comfortably perched. Perhaps there might be a pair of them, when the situation was likely to be somewhat more strained. Joel even wished now they had asked a couple of the fellows to accompany them, so as to make the capture more certain. Once or twice they found themselves compelled to make a little detour, because the ground in front was too open, and offered little in the way of a screen; but Jack knew just how to manage, and Joel was quite willing to leave matters in the hands of his associate. Everybody trusted Jack Winters, when a task was to be performed; and it is a great thing for any boy to possess the confidence of his mates in this fashion. "We're getting mighty close now, Jack," whispered Joel, presently. "I can see the trunk of the big oak all right. It's got limbs pretty near the ground too, so that spy couldn't have had a very hard time of it climbing up. I reckon he must have hit on that particular tree partly on that account." "Keep quiet, Joel, he might hear you," warned Jack; although truth to tell there was little fear of that, because all the while there came across the field the cries of the workers and the chatter of those who looked on. A little farther and Jack stopped short. He held up a finger as if to tell Joel not to say anything. But that worthy was crouching there, listening as if petrified, while a look of astonishment bordering on consternation began to hold sway in his face. The truth of the matter was both boys had caught a series of giggles, and sounds of low laughter, which undoubtedly came from the direction of that particular tree; and what struck them as a staggering fact was that these gurgling noises seemed to be of a girlish character, rather than to proceed from boys.