All was quiet.
Had his trap sprung? He could tell by finding a rubber glove among Grover’s things, with which to try the knob he had so recently turned with ease into his bathroom.
He got the insulating glove from among some old laboratory togs, too big for him but satisfactory for his need.
With care he turned the knob. The door did not yield. The system was on.
A difficulty came into mind.
To see if he had a captive he must release the heavy charge, by use of a small cable-key that broke the circuit. If his presumable evil-wisher was caught, he might get out before Roger could re-set the system.
He listened. There was not an audible sound, coming through the door.
Chapter 29
A SURPRISING CAPTURE
A sound in the lower hall made Roger turn. To his delight, Grover came in. Quickly the younger cousin set out the situation.
“Go down and draw the fuse again,” Grover suggested. “Queer that I did not think of that simple way to nullify all our protection. It explains how the safe was so easily opened, as well as Doctor Ryder’s situation. When you are ready, pull only the ten ampere fuse in the equalizer of the circuit marked number four.”