"That was kerosene I smelled when I was putting my wheel away," he said to himself. "Perhaps there is a barrel of it kept in that place for use about the house, or making an emulsion to kill insects on the trees and rose bushes! And Phil knows all about it if he used to be the gardener here. He also knows that the door of the tool house is never locked, but just fastened by a staple, a hasp, and that big nail held by a cord."

If, as seemed probable, the two men were bent on starting a fire that would, according to their evil way of thinking, pay the colonel back for their recent arrest, one of the first agencies for making a fierce blaze that Phil would be apt to think of must be that kerosene. It seems to appeal to every rogue who means to become an incendiary.

Elmer did not halt his footsteps. The terrible truth had thrilled, but not dismayed him. He was, in fact, more determined than ever to balk these villains in their intended work; though just why he kept on after them, when by rights he should have made direct for the front door of the house, Elmer was never able to explain to his own satisfaction. Some subtle power seemed to just pull him along as though he were being drawn by a powerful magnet which he could not successfully resist.

Yes, there could not be the slightest doubt now but that his guess was the true one; for just ahead he could see looming up the dark outlines of a building which he knew full well must be the tool house.

Again the men were whispering together, and the harsher tones of Phil seemed to breathe threatenings of some sort. Evidently the more timid Con was weakening once more, and had to be pulled on. His desire for revenge was doubtless quite as strong as that of his companion; but he lacked the bull-dog courage to put his evil designs into execution.

"Oh! if they would only both go inside that tool house!" Elmer was saying to himself exultantly, as a wonderful possibility flashed before his mind.

Phil evidently wanted to fully incriminate his companion. It was his desire to make the weaker rascal appear equally guilty with himself. His expressed intention of having the taller fellow strike the match that was to start things going, was ample proof of this.

Would he himself enter the tool house to secure the kerosene? That would leave the timid one outside; and possibly he might seize upon such a golden opportunity to flee.

If Phil suspected him of harboring such an intention, then it was hardly likely that he would allow the other a chance to remain alone. On the contrary, his plan would be to insist upon Con accompanying him in. And that was just what Elmer was hoping would occur; for he had a little plan of his own, which had come into his active mind almost like an inspiration, and which he would then be able to put into practice.

Now they were at the door of the tool house. Elmer was trying to remember just what it looked like. It had a small window, to be sure, but, unless he was mistaken, this had been protected by several stout iron bars, apparently with a view of preventing thieves from entering at some time in the past, when valuable things may have been kept there by the gentleman owning the estate before its purchase by the present occupant.