each them?'"

"'You mean, how long does a lesson last?' he asked me."

"'Yes,' I told him."

"'Oh, about a half-hour,' he says. 'Say! What floor do you want?' he
shot at me as he reached the top."

"'Good Lord!' I says, winking at him. 'That dame sure upset me. I
want to go back two floors.'"

"When he let me out I hustled over to the stairway, went down to the
ground floor, and when Marsh had his eyes turned away for a minute,
I beat it out and up Michigan."

"Now, Morgan, here's where I was clever. That girl was good for a
half-hour and so was Marsh, if he was following her; as I was pretty
sure he was. Now you or I haven't seen all of the inside of Marsh's
apartment, have we? And yet we suspect this guy, and want to get
something on him if we can."

Morgan nodded, and began to smile as he gathered what Tierney was
about to tell him.

"Well, Morgan, I figured that a half-hour would give me all the time
I needed, so I ran over to the elevated and went back to Lawrence
Avenue. I slipped up the alleyway, back of the house, and climbed
the rear stairs to Marsh's flat. After thumping on the door several
times I made sure no one was home, especially as the shades in the
kitchen and the pantry were pulled down. So I pulled out my bunch of
keys and had the luck to find one that opened the lock. I closed the
door softly, and tiptoed through the kitchen and the dining room.
Would you believe it, Morgan--THERE WASN'T A STICK OF FURNITURE IN
THOSE ROOMS!"

"You mean the place was empty?" asked Morgan.

"Up to the entrance to the hallway it was absolutely bare, Morgan.
The living room is furnished, and so is the bedroom; and there were
a few toilet articles in the bathroom. He has a pair of heavy drapes
across the doorway to the dining room, so that anyone coming in
would never guess the back part wasn't furnished. I looked things
over pretty carefully in the few minutes I had, and I didn't find a
single article that belonged to a woman. I tell you, Morgan, that
fellow's living there alone and only got half the flat furnished!
Take it from me, he's got something on. That flat's just a blind. If
it was me, I'd lock him up tonight."

"Well, it's coming pretty soon, Tierney," acceded Morgan. "What
you've found out today will help a lot."

There was a few minutes pause as the two men smoked their pipes, and
Morgan analyzed the facts which Tierney had given him. Suddenly he
leaned over and picked up the telephone from