THE MESSAGE "I'm a dumb-bell!" said Nick in a quick inspiration.

"Go down and turn on the main switch; it's in a box on the wall in the vestibule; just pull the handle down and push it in below.

We'll never get any juice up here with that turned off.

Hurry up." Norton descended the ladder and with lighted matches found his way to the vestibule where the switch-box was.

Here was the big switch on which all other switches in the building depended.