"I began to examine that chair and its surroundings carefully,"
continued Marsh, ignoring the interruption. He then moved over to
the chair, and added, as he pulled it to one side, "I moved it away
like this. Now, look at the floor!"

The policemen crowded forward. What Marsh had found was apparent at
once. On the light background of the rug was a large, dark spot
which the chair had covered. The plain-clothes man stooped and
placed his hand on the spot. It felt damp to the touch, and as he
stood erect again, holding his hand under the light, they all saw
that the fingers were covered with a thin film of red.

"Blood!" cried Murphy.

"Yep," affirmed the plain-clothes man. "Fresh blood!"

Excited exclamations from the others showed their appreciation of
the discovery.

Marsh smiled.

"I guess that looks like a possible murder," he said.

"The chair was placed there to cover the spot, all right," now
admitted the plain-clothes man.

"But what became of the body?" again questioned Murphy.

"As I said before," Marsh answered him, "that is for you to find
out. It is not my business."