In a moment he was back on the escalator, descending to the next floor. At the foot of the stairs, he started quickly down the corridor Blackie had indicated, glancing at each door as he passed. The first two had lights under them, indicating that these apparently were operating rooms still in use. Finally he stopped before a large, heavy door, with a simple sign painted on the wooden panel: Computor Technicians Only. He tried the door, found it locked. Quickly he glanced up and down the corridor, doubled a hard fist and drove it through the panel with a crunch. Then he fumbled inside for the lock.

In an instant he was inside. The torn hole in the panel glared at him. He threw the door wide open and snapped on the overhead lights, throwing the room into bright fluorescent light. Then he drew the pale-green gown closer about him and moved across the room to the huge file panel that faced him.

It was not his first experience with the huge punched-card files which had become so necessary in organizations where the numbers and volumes of records made human operatives too slow or clumsy. Quickly Jeff moved to the master-control panel, searched for the section and coding system for Research: Subject Personnel.

First he would try the simple coding for Conroe's name, on the chance that Conroe had come in using his own name. Jeff rechecked the coding, punched the buttons which would relay through the cards alphabetically; then he waited as the machinery whirred briefly. A panel lighted near the bottom of the control board, spelling the two words: No Information.

Jeff's fingers sped over the coding board again, as he started coding in a description. He coded in height, weight, eye color, hair color, bone contour, lip formation—every other descriptive category he could think of. Then again he punched the "Search" button.

This time several dozen cards fell down. He picked them up from the yield-slot and slowly leafed through them, glancing both at the small photograph attached to each card and at the small "date of admission" code symbol at the top of each card. Again he found nothing. Disgusted, he tried the same system again, this time adding two limiting coding symbols: Subject Personnel and Recent Admission. And again the cards were negative. Not a single one could possibly have been connected with Paul Conroe.

Jeff sat down at the desk facing the panel and he searched his mind for another pathway of identification. Suddenly a thought occurred to him. He searched through his pocket for a picture wallet, drew out the small, ID-size photo of Conroe that he carried for identification purposes.

Searching the panel, he finally found the slot he was looking for: the small, photoelectronic chamber for recording picture identification. He slipped the photo into the slot, punched the "Search" button, and waited again, his whole body tense.

The machine buzzed for a long moment. Then a single card dropped into the slot. Eagerly Jeff snatched it up, stared down at the attached photograph which almost perfectly matched the photo from his pocket. Near the top of the card was a small typewritten notation: Conroe, Paul A., Information Restricted. All File Notations Recorded in Hoffman Center Central Archives.

Below this notation was a list of dates. Jeff read them, staring in disbelief, then read them again. Incredible, those dates—dates of admission to the Hoffman Center and dates of release. It was impossible that Conroe could have been here at the times the dates indicated: ten years ago, when the Hoffman Center was hardly opened; five years ago, during the very time when Jeff had been tracking him down. Yet the dates were there, in black and white, cold, impersonal, indisputable. And below the dates was a final notation, inked in by hand: Central Archives Classification: ESP Research.