 Which best summarizes this story?
[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.] 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. And since it seems to be pinpointed in your home area—" "You don't have to justify yourself. Now I want answers, not questions! In a back room Tremaine said, "To everybody but you this is just a visit to the old home town. 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 point is this, Jess: we think we've got it narrowed down to this section. They used to raise cain in the other drug store...." I had the whole caboodle locked up here for six hours. I used to think she was some kind of princess...." "This would ha' been about nineteen-oh-one. "After dark. Ten yards along the dim corridor, a hand-lettered cardboard sign over a black-varnished door said "MUNICIPAL OFFICE OF RECORD."
 An investigator travels to his hometown to locate a transmitter with an unknown use.
 A private investigator tries to find a transmitter which allows him to save his hometown from certain danger.  An investigator travels to his hometown to find conflict between the transmitter-using youth and the local and state police forces.  An investigator travels to his hometown to locate a transmitter with an unknown use.  A man seeks justice for a town plagued by a harmful transmitter.