“Did anybody see it done?”

“No, although it is known when it was done.”

“Let us go to his room.”

“Very well.”

“As you are familiar with the house, suppose you lead the way.”

With an assenting nod Mr. Barnes did so.

He led the way upstairs and to a room in the front of the house.

As he crossed the threshold of this room he said:

“This room was used by him as a sort of library. His sleeping room is just back of this.”

The detective gave one keen glance around him and then said: