That blank wall above the fireplace looked as promising as any.

He tapped it gently with the golf club--afraid to make too much noise and yet anxious to test the wall as thoroughly as possible.

A dull, heavy reverberation answered his stroke--nothing hollow there apparently.
As he tried another spot, again thunder beat the long roll on its iron drum outside, in the night.

The lights blinked--wavered--recovered.
"The lights are going out again," said Dale dully, her excitement sunk into a stupefied calm.
"Let them go! The less light the better for me.

The only thing to do is to go over this house room by room." He pointed to the billiard room door.