He worked fast, but with the care of an engraver. The waitress returned before he had finished. The call light warned him; he covered the label with his elbow and kept it covered.

She glanced at the mailing tubes as she put down the beer and a bowl of pretzels. "Want me to mail those?"

He had another instant of split-second indecision. When he had stepped out of the tube car he had been reasonably sure, first, that the persona of Joel Abner, commercial traveler, had not been penetrated, and, second, that the transition from Abner to Gilead had been accomplished without arousing suspicion. The pocket-picking episode had not alarmed him, but had caused him to reclassify those two propositions from calculated certainties to unproved variables. He had proceeded to test them at once; they were now calculated certainties again of the opposite sort. Ever since he had spotted his erstwhile porter, the New Age runner, as standing outside this same drugstore bis subconscious had been clanging like a burglar alarmIt was clear not only that he had been spotted but that they were organized with a completeness and shrewdness he had not believed possible.

But it was mathematically probable to the point of certainty that they were not operating through this girl. They had no way of knowing that he would choose to turn aside into this particular drugstore. That she could be used by them he was sure and she had been out of sight since his first contact with her. But she was clearly not bright enough, despite her alleycat sophistication, to be approached, subverted, instructed and indoctrinated to the point where she could seize an unexpected opportunity, all in a space of time merely adequate to fetch two bottles of beer. No, this girl was simply after a tip. Therefore she was safe,

But her costume offered no possibility of concealing three mailing tubes, nor would she be safe crossing the concourse to the post office. He had no wish that she be found tomorrow morning dead in a ditch.

"No," he answered immediately. "I have to pass the post office anyway. But it was a kind thought. Here." He gave her a half credit.

"Thanks." She waited and stared meaningfully at the beer. He fumbled again in his change pocket, found only a few bits, reached for his wallet and took out a five-pluton note.

'Take it out of this."

She handed him back three singles and some change. He pushed the change toward her, then waited, frozen, while she picked it up and left. Only then did he hold the wallet closer to his eyes.

It was not his wallet.

He should have noticed it before, he told himself. Even though there had been only a second from the time he had taken it from?' the runner's clutched fingers until he had concealed it'in a front pocket, he should have known it known it and forced the runner to disgorge, even if he had had to skin him alive.

But why was he sure that it was not his wallet? It was the proper size and shape, the proper weight and feel real ostrich skin in these days of synthetics. There was the weathered ink stain which had resulted from carrying a leaky stylus in the same pocket. There was a V-shaped scratch on the front which had happened so long ago he did not recall the circumstances.

Yet it was not his wallet.

He opened it again. There was the proper amount of money, there were what seemed to be his Explorers' Club card and his other identity cards, there was a dog-eared flat-photo of a mare he had once owned. Yet the more the evidence showed that it was his, the more certain he became that it was not his. These things were forgeries; they did not feel right.

There was one way to find out. He flipped a switch provided by a thoughtful management; the booth; became dark. He took out his penknife and carefully slit a seam back of the billfold pocket. He dipped a finger into a secret pocket thus disclosed and felt around; the space was empty nor in this case had the duplication of his own wallet been quite perfect; the space should have been lined, but his fingers encountered rough leather.

He switched the light back on, put the wallet away, and resumed his interrupted drawing. Tlie loss of the card which should have been in the concealed pocket was annoying, certainly awkward, and conceivably disastrous, but he did not judge that the information on it was jeopardized by the loss of the wallet. The card was quite featureless unless examined by black light; if exposed to visible Ught by some one taking the real wallet apart, for example it had the disconcerting quality of bursting explosively into flame.

He continued to work, his mind busy with the wider problem of why they had taken so much trouble to try to keep him from knowing that his wallet was being stolen and the still wider and more disconcerting question of why they had bothered with his wallet. Finished, he stuffed the remainder of the pad of address labels into a crack between cushions in the booth, palmed the label he had prepared, picked up the bag and the three mailing tubes. One tube he kept separate from the others by a finger.

No attack would take place, he judged, in the drug store. The crowded concourse between himself and the post office he would ordinarily have considered equally safe but not today. A large crowd of people, he knew, are equal to so many trees as witnesses if the dice were loaded with any sort of a diversion.

He slanted across the bordering slidewalk and headed directly across the middle toward the post office, keeping as far from other people as he could manage. He had become aware of two men converging on him when the expected diversion took place.

It was a blinding light and a loud explosion, followed by screams and startled shouts. The source of the explosion he could imagine; the screams and shouts were doubtless furnished free by the public. Being braced, not for this, but for anything, he refrained even from turning his head.

The two men closed rapidly, as on cue.

Most creatures and almost all humans fight only when pushed. This can lose them decisive advantage. The two men made no aggressive move of any sort, other than to come close to Gilead nor did they ever attack.

Gilead kicked the first of them in the knee cap, using the side of his foot, a much more certain stroke than with the toe. He swung with his travel bag against the other at the same time, not hurting him but bothering him, spoiling his timing. Gilead followed it with a heavy kick to the man's stomach.

The man whose knee cap he )iad ruined was on the pavement, but still active reaching for something, a gun or a knife. Gilead kicked him in the head and stepped over him, continued toward the post office.

Slow march slow march all the way! He must not give the appearance of running away; he must be the perfect respectable citizen, going about his lawful occasions.

The post office came close, and still no tap on the shoulder, no denouncing shout, no hurrying footsteps. He reached the post office, was inside. The opposition's diversion had worked, perfectly but for Gilead, not for them,

There was a short queue at the addressing machine. Gilead joined it, took out his stylus and wrote addresses on the tubes while standing. A man joined the queue almost at once; Gilead made no effort to keep him from seeing what address he was writing; it was "Captain Joseph Gilead, the Explorers' Club, New York." When it came his turn to use the symlwl printing machine he still made no effort to conceal what keys he was punching and die symbol address matched the address he had written on each tube.

He worked somewhat awkwardly as the previously prepared gummed label was still concealed in his left palm.

He went from the addressing machine to the mailing receivers; the man who had been behind him in line followed him without pretending to address anything.

Thwonk! and the first tube was away with a muted implosion of compressed air. Thwonk! again and the second was gone and at the same time Cilead grasped the last one in his left hand, sticking the gummed label down firmly over the address he had just printed on itWithout looking at it he made sure by touch that it was in place, all comers sealed, then thwonk! it joined its mates.