So I got ready to go. I took under light hypnosis a refresher in the languages I would need with emphasis on shibboleth phrases of the latest meanderings of the Party Line. I was provided with a personality and coached in a trade which would permit me to travel, repairman for irrigating pumps-and given much money. If it suited me, my trade would let me hint that a pump had been sabotaged. Coercion, intimidation, blackmail, and bribery are especially useful behind the Curtain; the people have lived under a terror so long that they have no defenses; their puppet strings are always at hand.

I was to be dropped, rather than let to crawl under the Curtain. If I failed to report back, other agents would follow. Probably other agents would anyhow-or already had gone. I was not told; what an agent does not know he cannot divulge, even under drugs.

The reporting equipment was a new model and a joy to have. Ultramicrowave stuff with the directional cavity no bigger than a teacup and the rest, power pack and all, hardly larger than a loaf of bread, with the whole thing so well shielded that it would not make a Geiger counter even nervous. Strictly horizon range-I was to aim it at whatever space station was above the horizon. It had to be aimed closely, which required me to seal into my mind the orbital tables of all three space stations and a navigational grid of the territory I was to operate in. The handicap was really its prime advantage; the highly directional quality of the sender meant that it would not be detected save by wild accident.

I had to drop through their screen but it would be under a blanket of anti-radar "window" to give their search technicians fits. They would know that something was being dropped, but they would not know what, nor where, nor when, for mine would not be the only blanket, nor the only night of such tactics.

Once I had made up my mind whether the USSR was or was not slug infested I was to dictate a report to whatever space station was in sight, the line-of-sight, that is; I can't pick out a space station by eye and I doubt those who say they can. Report made, I was free to walk, ride, crawl, sneak and/or bribe my way out if I could.

The only trouble was that I never had a chance to use these preparations; the Pass Christian saucer landed.

The Pass Christian saucer was only the third to be seen after landing. Of the first two, the Grinnell saucer had been concealed by the slugs-or perhaps it took off again-and the Burlingame saucer was a radioactive memory. But the Pass Christian saucer was tracked and was seen on the ground almost at once.

It was tracked by Space Station Alpha-and recorded as an extremely large meteorite believed to have landed in or near the Gulf of Mexico. Which fact was not connected with the Pass Christian saucer until later but which, when it was, told us why we had failed to spot other landings by radar screen . . . the saucers came in too fast.

The saucers could be "seen" by radar-the primitive radar of sixty-odd years ago had picked them up many times, especially when cruising at atmospheric speeds while scouting this planet. But our modern radar had been "improved" to the point where saucers could not be seen; our instruments were too specialized. Electronic instruments follow an almost organic growth toward greater and greater selectivity. All our radar involves discriminator circuits and like gimmicks to enable each type to "see" what it is supposed to see and not bother with what it should ignore. Traffic block control sees atmospheric traffic only; the defense screen and fire control radars see what they are supposed to see-the fine screen "sees" a range from atmospheric speeds up to orbiting missiles at five miles a second; the coarse screen overlaps the fine screen, starting down at the lowest wingless-missile speed and carrying on up into the highest spaceship speeds relative to Earth and somewhat higher-about ten miles per second.

There are other selectivities-weather radar, harbor radar, and so forth. The point is none of them sees objects at speeds over ten miles per second . . . with the single exception of meteor-count radars in the space stations, which are not military but a research concession granted by the U.N. to the Association for the Advancement of Science.

Consequently the "giant meteor" was recorded as such and was not associated with flying saucers until later.

But the Pass Christian saucer was seen to land. The submersible cruiser U.N.S. Robert Fulton on routine patrol of Zone Red out of Mobile was ten miles off Gulfport with only her receptors showing when the saucer decelerated and landed. The spaceship popped up on the screens of the cruiser as it dropped from outer-space speed (around fifty-three miles per second by the space station record) to a speed the cruiser's radars would accept.

It came out of nothing, slowed to zero, and disappeared from the screen–but the operator had a fix on the last blip, less than twenty miles away on the Mississippi coast. The cruiser's skipper was puzzled. The radar track surely could not be a ship, since ships don't decelerate at fifty gravities. It did not occur to him that g's might not matter to a slug. He swung his ship over and took a look.

His first dispatch read: SPACESHIP LANDED BEACH WEST OF PASS CHRISTIAN MISSISSIPPI. His second was: LANDING FORCE BEACHING TO CAPTURE.

If I had not been in the Section offices I suppose I would have been left out of the party. As it was my phone shrilled so, that I bumped my head on the study machine I was using and swore. The Old Man said, "Come at once. Move!"

It was the same party we had started with so many weeks-or was it years?-before, the Old Man, Mary, and myself. We were in the air and heading south at emergency maximum, paying no attention to block controls and with our transponder sending out the police warning, before the Old Man told us why.

When he did tell us, I said, "Why the family group? You need a full-scale air task force."

"It will be there," he answered grimly. Then he grinned, his old wicked grin, an expression I had not seen since it started. "What do you care?" he jibed. "The 'Cavanaughs' are riding again. Eh, Mary?"

I snorted. "If you want that sister-and-brother routine, you had better get another boy."

"Just the part where you protect her from dogs and strange men," he answered soberly. "And I do mean dogs and I do mean strange men, very strange men. This may be the payoff, son."

I started to ask him more but he went into the operator's compartment, closed the panel, and got busy at the communicator. I turned to Mary. She snuggled up with a little sigh and said, "Howdy, Bud."

I grabbed her. "Don't give me that 'Bud' stuff or somebody's going to get a paddling."