 Of the following options, which seems to be Tremaine's biggest asset in his investigation?
[Transcriber's Note: This etext was produced from Worlds of Tomorrow April 1963 Extensive research did not uncover any evidence that the U.S. copyright on this publication was renewed.] He was as ancient as time—and as strange as his own frightful battle against incredible odds! In his room at the Elsby Commercial Hotel, Tremaine opened his luggage and took out a small tool kit, used a screwdriver to remove the bottom cover plate from the telephone. He inserted a tiny aluminum cylinder, crimped wires and replaced the cover. Then he dialed a long-distance Washington number and waited half a minute for the connection. Grammond's boys are supposed to keep me informed. Meantime, I'm not sitting in this damned room crouched over a dial. Project Officer for the hyperwave program—he's been on my neck day and night. You elected me to be a leg-man: now let me do it my way." "I felt a technical man might succeed where a trained investigator could be misled. And since it seems to be pinpointed in your home area—" "You don't have to justify yourself. Now I want answers, not questions! I'm warning you, Tremaine. Tremaine left the hotel, walked two blocks west along Commerce Street and turned in at a yellow brick building with the words ELSBY MUNICIPAL POLICE cut in the stone lintel above the door. Tremaine took off his hat. "Jimmy," he said, "Jimmy Tremaine." In a back room Tremaine said, "To everybody but you this is just a visit to the old home town. Between us, there's more." Tremaine covered the discovery of the powerful unidentified interference on the high-security hyperwave band, the discovery that each transmission produced not one but a pattern of "fixes" on the point of origin. It showed a set of concentric circles, overlapped by a similar group of rings. "I think what we're getting is an echo effect from each of these points of intersection. The rings themselves represent the diffraction pattern—" "Hold it, Jimmy. "The point is this, Jess: we think we've got it narrowed down to this section. I'm not sure of a damn thing, but I think that transmitter's near here. "Course," said Jess, "there's always Mr. Bram ..." "Mr. Bram," repeated Tremaine. "I've never seen any harm in Bram," said Jess.
 His history with the town. Folks knew him and were more willing to help him like Miss Carroll, and he knew how to motivate people, like he did by bribing the record keeper for help.
 His history with the town. Folks knew him and were more willing to help him like Miss Carroll, and he knew how to motivate people, like he did by bribing the record keeper for help.  His good looks. They help him flirt with women like Miss Carroll and the librarian, so he could get more information.  His strength. He was able to bust down the door at Mr. Bram's home and catch him in the act of transmitting data.  His ruthlessness. He was strict enough to draw boundaries with the state police that helped his investigation significantly.