It was terribly realistic, too, with the vast volumes of smoke rising up in billows, and here and there what seemed to be a red tongue of fire shooting through the appalling waves of black vapor.

Presently, as the boys understood, matters would reach a climax. This was when the hero knight attained the goal for which he was striving so valiantly.

Then he would be seen attacking the fastened door furiously, while inside and out that ominous smoke curled in wreaths about him. In the end, just when it seemed as though all would be lost, of course, the knight must batter his way in through the broken door, and the dashing rescue would be complete.

Hugh was beginning to feel nervous, and with a reason. While his chums' were wholly wrapped up in observing the numerous exciting incidents that fell under their observation, and connected with the work of the laboring players, the scout master had made a sudden discovery that worried him.

It was a very small matter, and would never have been noticed by any one whose training had not been that of a scout, accustomed to observing everything happening around him. But small matters may become deciding factors.

The wind had shifted all of a sudden, and besides coming from a new quarter was rapidly growing in violence. Hugh knew this from the way the smoke had turned and was now sweeping toward the southeast. This fact, while trifling in itself, might, as he well knew, assume a terrible significance when it was remembered that a dozen industrious supers were playing with fire, and causing it to appear that the whole wing of the castle were enveloped in flames, real or make-believe.

Hugh had eyes for nothing else after making that thrilling discovery. He watched with his nerves on edge, and at the same time began to think within that active brain of his what his plan of campaign must be should the worst that he feared come to pass.

Those hoarse shouts of the combatants, the clang of steel smiting steel, the roar of the manager's voice through his big megaphone, the shrieks of the women connected with the troupe, induced by the real excitement of the occasion—-all these sounds fell upon deaf ears as Hugh gripped his chum Arthur by the arm and called his attention to the impending peril, becoming greater with every second.

"The wind, don't you see it's whipped around, and is coming from a new quarter?" was the tenor of what he called in the other's ear. "If that fire gets away from those supers it's going to give them a heap of trouble! Yes, it will chase those fighters out of the passages in a hurry, and I'm afraid it'll even cut off the poor girl who is supposed to be locked in that turret room."

"Hugh, look! look!" ejaculated Arthur, in sudden excitement; "Just as you said, I do believe the fire has got beyond their control already. Listen to the way everybody is whooping it up now. It's real fright that we hear, and no make-believe!"