the tabouret.

"What's doing?" exclaimed Tierney.

"We shouldn't leave that man Marsh unwatched from now on," explained
Morgan.

"I know it, Morgan, and I've taken care of all that."

"You mean the house is watched?"

"Sure," said Tierney. "The minute I got out of the flat this
afternoon I telephoned the captain of the precinct and told him just
enough to get his co-operation. There's a man on the job now and he
won't leave there, unless he follows Marsh, until I relieve him in
the morning."

"There's one drawback to that," observed Morgan, as he set the
telephone back in place. "No one knows Marsh except you."

"There's a man knows him better than I do--Murphy, the man on the
beat. He spent quite a spell with Marsh last night."

"That's right," agreed Morgan. "How did you fix it?"

"The Captain put another man on Murphy's beat, and put Murphy into
plain-clothes for tonight. It worked all right, because Murphy was a
night man anyway."

"You're all right, Tierney," Morgan complimented him.

Tierney grinned his appreciation.

"Now then, Tierney," went on Morgan, "you relieve Murphy in the
morning, and watch things until I can get on the job. After I
relieve you, you get in touch with Headquarters and have some
fingerprint photos taken."

"Did you find finger prints?" exclaimed Tierney, sitting up with a
start.

"No," explained Morgan, "but I found the marks of the sides of
somebody's hands on the dining room table in that flat. I want them
prepared and photographed just as if they were fingerprints."

"But you can't identify anybody by marks of that kind," remarked
Tierney, with an inquiring note in his voice.

"Probably not," Morgan returned. "I haven't the slightest idea how I
could make use of such a photo now. But I want to provide against
anything that may turn up. The marks are there, and we might as well
have a record of them."

Tierney opened his mouth to reply, but at that instant Morgan held
up a warning hand.

In many of the older and smaller apartments, such as the one
occupied by Morgan, the door from the main hall opens directly into
the living room. Such was the arrangement here, and Morgan slowly
turned his head toward this door and listened intently. Then he
carefully arose from his chair, moved softly around the corner of
the table, and slowly tiptoed toward the door. Tierney had not heard
a sound, yet he instantly became as alert as Morgan. He stood ready
for a quick move, if n