The method employed an ability that had been evolving in the human mind for millennia--the ability to project oneself into a past moment--or, to use Trevor's term, a past "place-time." Considerable practice was required before the first transition could be achieved, but once it was achieved, successive transitions became progressively easier. Entering another person's mind-world was of course a more difficult undertaking, and could be achieved only after an intensive study of a certain moment in that person's past. In order to return to the objective world, it was necessary in both cases to locate the most recently materialized place-time and take one step beyond it. By their very nature, mind-countries were confusing. They existed on a plane of reality that bore no apparent relationship to the plane of the so-called objective universe. In fact, so far as was known, this secondary--or subjective--reality was connected to so-called true reality only through the awareness of the various creators. In addition, these countries had no outward shape in the ordinary sense of the word, and while most countries contained certain parallel images, these images were subject to the interpretation of the individual creator. As a result they were seldom identical. * * * * * It was inevitable that sooner or later some criminal would hit upon the idea of hiding out in his own mind-world till the statute of limitations that applied to his particular crime ran out, and it was equally inevitable that others should follow suit. Society's answer was the psyche-police, and the psyche-police hadn't been in action very long before the first private psycheye appeared. Blake was one of a long line of such operators. So far as he knew, the present case represented the first time a criminal had ever hidden out in the pursuer's mind. It would have been a superb stratagem indeed if, shortly after her entry, Sabrina York had not betrayed her presence. For her point of entry she had used the place-time materialization of the little office Blake had opened on Ex-earth at the beginning of his career. Unaccountably she had ransacked it before moving into a co-terminous memory-image. Even this action wouldn't have given her away, however, if the office hadn't constituted a sentimental memory. Whenever Blake accepted a case he invariably thought of the bleak and lonely little room with its thin-gauge steel desk and battered filing cabinets, and when he had done so after accepting his case--or was it before? He couldn't quite remember--the mental picture that had come into his mind had revealed open drawers, scattered papers and a general air of disarray.