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56 till he investigated, and ran down the ladder.

He found the lever cables chained to a wall bracket. Of course here was some more spite work. He removed the obstruction, hurried upstairs, switched the delayed engine, and kept an eye out for the watchman who covered that part of the yards.

When he finally appeared in view, Ralph hailed him and asked him to come inside the tower.

"Mr. Brady," he explained, "I wish you would keep a close eye on the lower story here for a day or two."

"Why, what's wrong?" inquired the watchman.

"Well, someone is up to dirty work," replied Ralph. "They tried to put two levers out of commission yesterday, and just now I found another lever chained up."

The watchman looked startled, and whistled under his breath.

"That's pretty serious," he remarked.

"It is," responded Ralph. "I wish you would keep a watch on strangers."

"And discharged employees?" interrogated the watchman, with a shrewd nod. "I think I know what's up, and who is up to it."

Ralph felt certain that Mort Bemis was back