Devil Crystals of Arret

Benjamin Marlowe and his young assistant, Larry Powell, opened the door of the Marlowe laboratory, then stopped aghast at the sight which greeted their startled eyes.
There on the central floor-plate directly in the focus of the big atomic projector stood the slender figure of Joan Marlowe, old Benjamin Marlowe’s niece and Larry Powell’s fiancee.
The girl had apparently only been awaiting their return to the laboratory for around her gray laboratory smock was already fastened one of their Silver Belts, and a cord was already in place running from her wrist to the main switch of the projection mechanism.
Joan’s clear blue eyes sparkled with the thrill of high adventure as she swiftly raised a slender hand in a gesture of warning to the two men.
“Don’t try to stop me,” she warned quietly. “I can jerk the switch and be in Arret, before you’ve taken two steps. I’m going to Arret, anyway. I was only waiting for you to return to the laboratory so I’d be sure of having you here to bring me back to Earth again before I have time to get into any serious trouble over there.”