THE FIRST-QUARTER ROCKET from Moonbase put him down at Pied-a-Terre. The name he was traveling under began by foresight with the letter "A"; he was through port inspection and into the shuttle tube to the city ahead of the throng. Once in the tube car he went to the men's washroom and locked himself in.

Quickly he buckled on the safety belt he found there, snapped its hooks to the wall fixtures, and leaned over awkwardly to remove a razor from his bag. The surge caught him in that position; despite the safety belt he bumped his head and swore. He straightened up and plugged in the razor. His moustache vanished; he shortened his sideburns, trimmed the comers of his eyebrows, and brushed them up.

He towelled his hair vigorously to remove the oil that had sleeked it down, combed it loosely into a wavy mane. The car was now riding in a smooth, unaccelerated 300 mph; he let himself out of the safety belt without unhooking it from the walls and, working very rapidly, peeled off his moonsuit, took from his bag and put on a tweedy casual outfit suited to outdoors on Earth and quite unsuited to Moon Colony's air-conditioned corridors.

His slippers he replaced with walking shoes from the bag; he stood up. Joel Abner, commercial traveler, had disappeared; in his place was Captain Joseph Gilead, explorer, lecturer, and writer. Of both names he was the sole user; neither was his birth name.

He slashed the moonsuit to ribbons and flushed it down the water closet, added "Joel Abner's" identification card; then peeled a plastic skin off his travel bag and let the bits follow the rest. The bag was now pearl grey and rough, instead of dark brown and smooth. The slippers bothered him; he was afraid they might stop up the car's plumbing. He contented himself with burying them in the waste receptacle.

The acceleration warning sounded as he was doing this; he barely had time to get back into the belt. But, as the car plunged into the solenoid field and surged to a stop, nothing remained of Joel Abner but some unmarked underclothing, very ordinary toilet articles, and nearly two dozen spools of microfilm equally appropriate until examined to a commercial traveler or a lecturer-writer. He planned not to let them be examined as long as he was alive.

He waited in the washroom until he was sure of being last man out of the car, then went forward into the next car, left by its exit, and headed for the lift to the ground level.

"New Age Hotel, sir," a voice pleaded near his ear. He felt a hand fumbling at the grip of his travel bag.

He repressed a reflex to defend the bag and looked the speaker over. At first glance he seemed an undersized adolescent in a smart uniform and a pillbox cap. Further inspection showed premature wrinkles and the features of a man at least forty. The eyes were glazed. A pituitary case, he thought to himself, and on the hop as well. "New Age Hotel," the runner repeated. "Best mechanos in town, chief. There's a discount if you're just down from the moon."

Captain Gilead, when in town as Captain Gilead, always stayed at the old Savoy. But the notion of going to the New Age appealed to him; in that incredibly huge, busy, and ultramodern hostelry he might remain unnoticed until he had had time to do what had to be done.

He disliked mightily the idea of letting go his bag. Nevertheless it would be out of character not to let the runner carry the bag; it would call attention to himself and the bag. He decided that this unhealthy runt could not outrun him even if he himself were on crutches; it would suffice to keep an eye on the bag.

"Lead on, comrade," he answered heartily, surrendering the bag. There had been no hesitation at all; he had let go the bag even as the hotel runner reached for it.

"Okay, chief." The runner was first man into an empty lift; he went to the back of the car and set the bag down beside him. Gilead placed himself so that his foot rested firmly against his bag and faced forward as other travelers crowded in. The car started.

The lift was jammed; Gilead was subjected to body pressures on every side but he noticed an additional, unusual, and uncalled-for pressure behind him.

His right hand moved suddenly and clamped down on a skinny wrist and a hand clutching something. Gilead made no further movement, nor did the owner of the hand attempt to draw away or make any objection. They remained so until the car reached the surface. When the passengers had spilled out he reached behind him with his left hand, recovered his bag and dragged the wrist and its owner out of the car.

It was, of course, the runner; the object in his fist was Gilead's wallet. "You durn near lost that. chief," the runner announced with no show of embarrassment. "It was falling out of your pocket."

Gilead liberated the wallet and stuffed it into an inner pocket. "Fell right through the zipper," he answered cheerfully. "Well, let's find a cop.'

The runt tried to pull away, "You got nothing on me!"

Gilead considered the defense. In truth, he had nothing. His wallet was already out of sight. As to witnesses, the other lift passengers were already gone nor had they seen anything. The lift itself was automatic. He was simply a man in the odd position of detaining another citizen by the wrist. And Gilead himself did not want to talk to the police.

He let go that wrist. "On your way, comrade. We'll call it quits."

The runner did not move. "How about my tip?"

Gilead was beginning to like this rascal. Locating a loose half credit in his change pocket he flipped it at the runner, who grabbed it out of the air but still didn't leave. "I'll take your bag now. Gimme."

"No, thanks, chum. I can find your delightful inn without further help. One side, please."

"Oh, yeah? How about my commission? I gotta carry your bag. else how they gonna know I brung you in? Gimme."

Gilead was delighted with the creature's unabashed insistence. He found a two-credit piece and passed it over. "There's your cumshaw. Now beat it, before I kick your tail up around your shoulders."

"You and who else?"

Gilead chuckled and moved away down the concourse toward the station entrance to the New Age Hotel. His subconscious sentries informed him immediately that the runner had not gone back toward the lift as expected, but was keeping abreast him in the crowd. He considered this. The runner might very well be what he appeared to be, common city riffraff who combined casual thievery with his overt occupation. On the other hand

He decided to unload. He stepped suddenly off the sidewalk into the entrance of a drugstore and stopped Just inside the door to buy a newspaper. While his copy was being printed, he scooped up, apparently as an afterthought, three standard pneumo mailing tubes. As he paid for them he palmed a pad of gummed address labels.

A glance at the mirrored wall showed him that his shadow had hesitated outside but was still watching him. Gilead went on back to the shop's soda fountain and slipped into an unoccupied booth. Although the floor show was going on a remarkably shapely ecdysiast was working down toward her last string of beads he drew the booth's curtain.

Shortly the call light over the booth flashed discreetly; he called, "Come in!" A pretty and very young waitress came inside the curtain. Her plastic costume covered without concealing.

She glanced around. "Lonely?"

"No, thanks, I'm tired."

"How about a redhead, then? Real cute"

"I really am tired. Bring me two bottles of beer, unopened, and some pretzels."

"Suit yourself, sport." She left.

With speed he opened the travel bag, selected nine spools of microfilm, and loaded them into the three mailing tubes, the tubes being of the common three-spool size. Gilead then took the filched pad of address labels, addressed the top one to "Raymond Calhoun, P. 0. Box 1060, Chicago" and commenced to draw with great care in the rectangle reserved for electric-eye sorter. The address he shaped in arbitrary symbols was intended not to be read, but to be scanned automatically. The hand-written address was merely a precaution, in case a robot sorter should reject his hand-drawn symbols as being imperfect and thereby turn the tube over to a human postal clerk for readdressing.