"Not exactly. I think I've discovered their own way. I can't be certain, but I'm willing to gamble on it, if you are."
"Then you—you think those round buttons are connected with the escalator rays?"
"Exactly! I think they control individual descent and ascent, just as the square ones control individual visibility and invisibility. At any rate, it's the hunch I'm going to act on right now, if you're with me."
"Oh, I'm with, you!" she breathed. "Anything, death almost, would be preferable to this."
"Then stand by, invisible. I'm going to get one of my jailors in here and relieve him of his wrist-watch."
Marjorie touched that little square button on her own. She instantly became invisible.
Kendrick touched a button too, a button he had noticed beside the door. As he had supposed, it brought one of the Vadans.
Shutting the door quietly, he seized the fellow before he could move his hand to his wrist. Thwarted in his attempt to vanish from sight, the diminutive guard attempted an outcry. But Kendrick promptly throttled him.
