THE ROOF SPACES As the fans in the circular aperture of the inner room rotated and permitted glimpses of the night, dim sounds drifted in thereby.

And Graham, standing underneath, was startled by the sound of a voice.
He peered up and saw in the intervals of the rotation, dark and dim, the face and shoulders of a man regarding him.

Then a dark hand was extended, the swift vane struck it, swung round and beat on with a little brownish patch on the edge of its thin blade, and something began to fall therefrom upon the floor, dripping silently.
Graham looked down, and there were spots of blood at his feet.

He looked up again in a strange excitement.

The figure had gone.
He remained motionless--his every sense intent upon the flickering patch of darkness.