Simply because he had never been in this spot at this hour on this day of the week. Hendley was a 3-Dayman. His identifying coverall was blue. He worked on Tuesdays, Thursdays, and Saturdays except during his assigned vacation month, when he customarily used his travel pass to visit one of the tourist recreation centers in another of the major cities. It was unthinkable that his vacation time would find him this close to home, and it was equally unlikely that he would be there on any of his four free days of the week, for even these days were quite taken up with the designated periods of recreation, education, physical therapy and discussion. In fact, Hendley was experiencing the rare sense of freedom which came from having nothing to do. This was what it must be like in the Freeman Camps, he reflected—seven days a week to enjoy the luxury of complete choice, of having each day stretch before you like a blank sheet of paper onto which you could dictate absolutely anything you wanted. Exhilarated by the freshness of the moment, he stared in fascination at the passing faces. It was like trying to study the waves of the sea. They dissolved even as you glanced at them and were instantly replaced by others. He began to feel a little dizzy from the effort of isolating the moving figures. You could only know a wave, he thought, know its form and strength and motion, by riding it. He stepped onto the slow strip of the sidewalk. Instantly the faces which had been streaming past him were arrested. He studied the man standing closest to him. He had Eastern blood, to judge by the Oriental caste of his features, the thick shock of black hair, the full upper eyelids. Hendley suspected that he caught the reflection of perma-lenses coating the dark eyes. The stranger wore a green coverall over a small, wiry body. A commissary worker, Hendley guessed, on an eleven to seven day schedule, going to work. Or a finish carpenter, skilled in manipulating the buttons which caused graceful designs to be carved in plastic and metal, on his way home from a two until ten morning shift. Middle-aged, with an unusual Eastern name that would have a low number after the initials. Devoted to his Assigned, the father of a brood of black-haired children, perhaps a boy to inherit his craft. This latter fancy evaporated. The stranger wore green. A finish carpenter would be further advanced than a 4-Dayman, would be closer to paying off his tax debt. That was