"I'll admit that my claim of friendship with Ames didn't work out well in this instance. However, it was an idea conceived in a hurry, and in the ordinary course of events would have really attracted little, if any, attention. You realize that I was in this house to watch certain people without disclosing my identity in any way. I knew positively that the flat over me was closed and empty. Then I was awakened suddenly in the night by a most suspicious disturbance. Naturally, I connected it immediately with the people I was watching. If I took an active interest in this trouble it might force my hand, because a moment's consideration will show you that the connection was only a guess on my part, and MIGHT not be a fact. My first thought, therefore, was to get the local police on the job as quickly as possible and still keep in touch with the incident myself."
"You may ask why I didn't telephone the Police Department, instead of running into the street. When I looked at my watch I saw that it was two o'clock, and I knew from observation that a patrolman was likely to be within a block or two of the house at that hour. On the other hand, if I telephoned, it might be twenty minutes before your men arrived, and you know, Morgan, that a lot can happen in twenty minutes."
"After your man had telephoned for help he was disinclined to have me butt into the matter any further. Yet, you can see how imperative it was for me to be on the job as well as your men. The first thought, and the most logical excuse, which came to my mind, was to tell the patrolman that the tenant of the flat was a personal friend of mine. This made it seem perfectly natural for me to follow up his interests in the matter. As to keeping track of your movements, it was only natural that I would want to keep in touch with your progress in the case as much as possible."
"One question, Marsh," said Morgan. "How in thunder could you see my partner's footsteps, as you said you did, in your apartment?"
Marsh laughed.
"Through a very simple precaution that I have taken ever since I moved in here—a little talcum powder sprinkled over the dining room floor. Now, Morgan, I have laid my cards on the table. You can see the close connection that probably exists between the Atwood counterfeiting case and whatever took place in the flat over us. If you have found out anything, outside of what you supposed to be my connection with the case, I would like to have the information.
"So that you can see how close the connection between the two cases really is, I will tell you that after your men left Tuesday morning, I did a little further investigating on my own account, and found what I believed to be a definite clue to the Atwoods' connection with the trouble."
"What was that?" asked Morgan.
"A SMALL SMEAR OF BLOOD ON THE DOORKNOB OF THE ATWOOD APARTMENT!"
The fact that Marsh, who had been surrounded by such suspicious circumstances that Morgan had been enabled to build up one of his quickest cases, had now turned out to be an operative of the Federal Government, was one of the most astounding things with which Morgan had ever met. It was obvious that for once in his life he had followed persistently on a blind trail, and now found himself only a little better off than when he started. Naturally, his professional pride was hurt, but the candid way in which Marsh had, to use his own words, laid his cards on the table, appealed to Morgan. He felt that this Government man was both broad-minded and efficient. He realized that there was surely more to gain by accepting Marsh's proposition, and working with him, than there would be if each worked alone, and very probably at cross purposes. The story which Marsh had told him, the surprising clue he had just offered, and the facts in his own possession, showed conclusively the close connection between the affair of the empty apartment and the Atwood counterfeiting case. Locating the murderer would undoubtedly bring the counterfeiters to light, and in the same way, locating the counterfeiters would probably disclose the perpetrator of this now unquestioned crime.