“Nothing less,” said Nick. “I suspected something of the kind.”

“That train is due here from Philadelphia soon after midnight.”

“A fit hour for such a felonious job,” Nick declared. “But we must be equal to the needs of the hour. Not a word of this to others, Holden, under any circumstances.”

“Surely not. You can depend upon my discretion.”

“I will make a copy of this letter. You then may reseal it and have it delivered precisely as if it had not been opened.”

“I will do so, Mr. Carter.”

It took Nick only a few moments to make the copy. Holden had not finished resealing the letter, however, when the ringing of the telephone was the harbinger of a communication from Patsy.

“Hold that letter until after I have a talk with him,” Nick directed.

Patsy’s report was brief and to the point.

“John Dalton is not known here,” said he, speaking from a booth in the Reddy House. “Gus Dewitt arrived here two days ago. He has been here on other occasions for a day or two, but nothing definite is known about him. He now is in the hotel office and evidently is waiting for the special-delivery letter.”