Within the room that the unfortunate woman had occupied Kennedy took
the coverings off the packages. It was nothing but a portable electric
vacuum cleaner, which he quickly attached and set running. Up and down
the floor, around and under the bed he pushed the cleaner. He used the
various attachments to clean the curtains, the walls, and even the
furniture. Particularly did he pay attention to the base board on the
wall back of the bed. Then he carefully removed the dust from the
cleaner and sealed it up in a leaden box.

He was about to detach and pack up the cleaner when another idea
seemed to occur to him. "Might as well make a thorough job of it,
Walter," he said, adjusting the apparatus again. "I've cleaned
everything but the mattress and the brass bars behind the mattress
on the bed. Now I'll tackle them. I think we ought to go into the
suction-cleaning business--more money in it than in being a detective,
I'll bet."

The cleaner was run over and under the mattress and along every crack
and cranny of the brass bed. This done and this dust also carefully
stowed away, we departed, very much to the mystification of Marie
and, I could not help feeling, of other eyes that peered in through
keyholes or cracks in doors.

"At any rate," said Kennedy exultingly, "I think we have stolen a
march on them. I don't believe they were prepared for this, not at
least at this stage in the game. Don't ask me any questions, Walter.
Then you will have no secrets to keep if anyone should try to pry them
loose. Only remember that this man Lawrence is a shrewd character."