Fifteen minutes after Mrs. Mackenzie and her pretended stepson had reached New York, Nick, in the new disguise of a farmer, was once more on his way to Elmwood, carrying with him a huge carpetbag.

His train left directly after the Elmwood express arrived, and he had the satisfaction of seeing his party disembark, and start toward the ferry before he stumbled up the steps into the smoking car of his train.

When he was once more in the presence of Dr. Abbott it was necessary to introduce himself anew.

But when Abbott realized that in the old farmer who stood before him he saw the great New York detective, he was not slow in posting Nick on the way the case lay at Elmwood.

“When I pleaded my duty to a sudden very dangerous case, wherein my services were demanded for this afternoon, Mrs. Mackenzie and her pretended stepson were very much disturbed. But when I assured them that you were a personal friend of the president of the insurance company, and had promised me to be on hand for the purpose of proof and identification, they agreed to go on and try it without me.”

“Well, now that the coast is clear, let us lose no time. Are you ready?”

“At your service.”

“Then come on.”

They went straight to the Mackenzie residence.

The stout servant, Emma, met them at the door, and there was a scowl on her face.