"There," remarked Kennedy when at last he had finished packing up
the dynamometer into two packages. "At least, Mr. Langhorne, you
have the satisfaction of knowing that it was in all probability a
man, a strong man, and one experienced in forcing doors who
succeeded in entering your office during your brief absence last
night"

Langhorne shrugged his shoulders non-committally, but it was
evident that he was greatly relieved and he could not conceal his
interest in what Kennedy was doing, even though he had succeeded
in conveying the impression that it was a matter of indifference
to him.

"I suppose you keep a great many of your valuable papers in safety
deposit vaults," ventured Kennedy, finishing up the wrapping of
the two packages, "as well as your personal papers perhaps at
home."

He made the remark in a casual manner, but Langhorne was too keen
to fall into the trap.

"Really," he said with an air of finality, "I must decline to be
interviewed at present. Good-day, gentlemen."

"A slippery customer," was Craig's comment when we reached the
street outside the office. "By the way, evidently Mrs. Ogleby is
leaving no stone unturned in her effort to locate that Black Book
and protect herself."

I said nothing. Langhorne's manner, self-confident to the point of