Chick hastened to do so.

Nick entered the library.

A sheet of paper was propped up conspicuously against a book on the table. It contained several pen-written lines.

Nick took up the sheet and read them:

“My Dear Carter: You solve the problem tardily. You arrive a little too late. There will be nothing for you in attempting to run down the writer. He is in a class of his own—and much your superior. Take a tip from me, therefore, and drop this matter. Don’t dig deeper into it, or you’ll surely tread on a rattlesnake. A word to the wise should be sufficient, or this warning from

Gerald Vaughn.”

Nick Carter’s face underwent a quick change. He had made a discovery which Gerald Vaughn had not for a moment anticipated. He recognized the writing, or felt reasonably sure that he did.

It was identical with the fine, clean-cut hand exhibited by Detective Conroy that morning—the writing of Mortimer Deland.[Pg 21]

CHAPTER V.
SUSPICIONS VERIFIED.

Nick Carter knew that he had found one important clew, at least, in the threatening communication which had been left there by Gerald Vaughn, as the latter had been known while occupying the Colonel Barker residence.