"We've done some fast checking on every possible angle," Steve said quietly, "and we've found a couple of interesting things. First of all, the man who reserved Bedroom D is in a Baltimore hospital. He was struck by a hit-and-run car as he walked from his office to the railroad station. Obviously, he was struck deliberately. He's in critical condition." "Then the man on the train..." Rick gasped. "Yes. Who was the man on the train? We don't know. We've had our Boston office go over the room, and they've turned up no fingerprints except those of the porter who cleaned up after the train left New York. The room was wiped clean. But our Boston men also found an interesting spot on the rug. They had a sample analyzed, and so far as we can determine, it's a kind of water-soluble salt paste often used by doctors when they take electrocardiograms." The group leaned forward, interested. Rick knew the kind of stuff Steve meant, because he had once watched Zircon getting an electrocardiogram. The big scientist had fainted from sheer overwork, and possible heart complications were suspected. The technician squeezed the paste from a tube and applied it to wrists, ankles, and chest, under the metal terminals of the machine. Its purpose was to allow a better electrical contact. Julius Weiss demanded excitedly, "Steve, do you imply that this unknown person took an electrocardiogram of Marks' heart responses?" The JANIG agent shrugged. "I imply nothing. I'm merely reporting." Again Parnell Winston spoke. "Perhaps I can shed some light on this. It's true that such an electropaste is used to make better connections for electrocardiograms. But perhaps of greater importance for this discussion, it is also used in making electroencephalograms." Rick and Scotty spoke in unison. "What?" Winston turned to them. "It's a long word, but not a difficult one. _Electro_ for electrical. _Encephalo_ is simply a Greek form meaning 'the brain.' _Gram_, also from the Greek, means something drawn or written. A record, if you like. So an electroencephalogram is simply an electrical recording of the brain." "That may be significant," Hartson Brant said thoughtfully. "But, assuming an enemy could get an EEG--which is the handy way of saying electroencephalogram, Rick and Scotty--what would he do with it?" Parnell Winston rose. "Hartson, I think you can conduct the rest of this without me. I have an extraordinary notion whirling around in my head that I'd like to discuss with Chavez. I'll pick up the car at the pier and drive over, if you don't mind. And by the way, Steve, can JANIG get some information for me?" "We can try." "Good. I want to know if the two team scientists who were stricken first had EEG's made after the attack. I would also like to check their medical history, as completely as possible, to find out if EEG's were ever taken while they were normal."