several peculiar things that I observed at your house, Carton, and
I have here an indelible record of the scene of the crime.
Preserved in this way, it cannot be questioned. You are sure that
the only thing missing is the photographs?"

Carton nodded, "I never keep anything valuable lying around."

"Well," resumed Kennedy, "the photographs were in this cabinet.
There are other cabinets, but none of them seems to have been
disturbed. Therefore the thief must have known just what he was
after. The marks made in breaking the lock were not those of a
jimmy, but of a screwdriver. No amazing command of the resources
of science is needed so far. All that is necessary is a little
scientific common sense."

Carton glanced at me, and I smiled, for it always did seem so
easy, when Craig did it, and so impossible when we tried to go it
alone.

"Now, how did the robber get in?" he continued, thoroughly
engrossed in his study. "All the windows were supposedly locked. I
saw that a pane had been partly cut from this window at the side--
and the pieces were there to show it. But consider the outside, a
moment. To reach that window even a tall man must have stood on a
ladder or something. There were no marks of a ladder or even of
any person in the soft soil of the garden under the window. What
is more, that window was cut from the inside. The marks of the
diamond which cut it plainly show that. Scientific common sense
again."