Doc finished screwing the casing shut and smiled to himself. Not bad for a few hours' work. He pressed the power button and the small screen lit up, displaying a map of their neighbourhood. Doc tapped in a few parameters and pressed a button. The gem on the device glowed brightly, then dimmed as Stormlight was drained from it. On the screen, several dots appeared, all within the house. Doc grinned widely. It had worked.
He navigated to a list titled 'Types of Investiture detected' it displayed a small number of Suges. Doc jumped up from his chair, pumping his fist.
"Yes! I did it!"
He plopped back down, still fiddling with the device. Time for a bigger test. He reset the parameters to the Seattle metro area, then pressed the button. The gem glowly blindingly for a split second, then went totally dark. The map changed to show around ten dots scattered all over Seattle. He pulled up the list, scrolling down. About halfway through, he paused, staring at a source labeled UNKOWN.
"What?" he murmured to himself. The source was located at Seatac airport. The only reason an UNKOWN identification would come up is if the detctor located a source of Investiture it couldn't recognize.
Doc felt dizzy. In the unlikely event that this wasn't a fluke of some sort, everything they knew could be turned on it's head.