"[...]you know, Mr. Bending. And they evidently thought they'd found a way. For two weeks, there had been phone calls from officers of greater or lesser importance in Power Utilities, but they all seemed to think that if they could offer enough money, Sam Bending would capitulate. Finally, they had taken the decisive step of stealing the Converter. Bending wondered how they had known where it was; he had taken the precaution of concealing it, just in case there might be an attempt at robbery, and using it as power supply for the lab had seemed the best hiding place. But evidently someone at Power Utilities had read Poe's "Purloined Letter," too.[...]".