As has been said, the Stretts were working, with all the intensity of their monstrous but

tremendously capable minds, upon their Great Plan, which was, basically, to conquer

and either enslave or destroy every other intelligent race throughout all the length,

breadth and thickness of total space. To that end each individual Strett had to become

invulnerable and immortal.

 Wherefore, in the inconceivably remote past, there had been put into effect a program

of selective breeding and of carefully calculated treatments. It was mathematically

certain that this program would result in a race of beings of pure force-beings having no

material constituents remaining whatever.

 Under those hellish treatments billions upon billions of Stretts had died. But the few

remaining thousands had almost reached their sublime goal. In a few more hundreds of

thousands of years perfection would be reached. The few surviving hundreds of perfect

beings could and would multiply to any desired number in. practically no time at all.

 Hilton and his seven fellow-workers had perceived all this in their one and only study of

the planet Strett, and every other Ardan had been completely informed.

 A dozen or so Strett Lords of Thought, male and female, were floating about in the

atmosphere-which was not air-of their Assembly Hall. Their heads were globes of ball

lightning. Inside them could be seen quite plainly the intricate convolutions of immense,

less-than-half-material brains, shot through and through with rods and pencils and

shapes of pure, scintillating force.

 And the bodies! Or, rather, each horrendous brain had a few partially material

appendages and appurtenances recognizable as bodily organs. There were no mouths,

no ears, no eyes, no noses or nostrils, no lungs, no legs or arms. There were, however,

hearts. Some partially material ichor flowed through those living-fire-outlined tubes.

There were starkly functional organs of reproduction with which, by no stretch of the

imagination, could any thought of tenderness or of love be connected.

 It was a good thing for the race, Hilton had thought at first perception of the things, that

the Stretts had bred out of themselves every iota of the finer, higher attributes of life. If

they had not done so, the impotence of sheer disgust would have supervened so long

since that the race would have been extinct for ages.

 "Thirty-eight periods ago the Great Brain was charged with the sum total of Strettsian

knowledge," First Lord Thinker Zoyar radiated to the assembled Stretts. "For those

thirty-eight periods it has been scanning, peyondiring, amassing data and formulating

hypotheses, theories and conclusions. It has just informed me that it is now ready to

make a preliminary report. Great Brain, how much of the total universe have you

studied?"

 "This Galaxy only," the Brain radiated, in a texture of thought as hard and as harsh as

Zoyar's own.

 "Why not more?"

 "Insufficient power. My first conclusion is that whoever set up the specifications for me

is a fool."

 To say that the First Lord went out of control at this statement is to put it very mildly

indeed. He fulminated, ending with: " . . . destroyed instantly!"

 "Destroy me if you like," came the utterly calm, utterly cold reply. "I am in no sense

alive. I have no consciousness of self nor any desire for continued existence. To do so,

however, would . . ."

 A flurry of activity interrupted the thought. Zoyar was in fact assembling the forces to

destroy the brain. But, before he could act, Second Lord Thinker Ynos and another

female blew him into a mixture of loose molecules and flaring energies.

 "Destruction of any and all irrational minds is mandatory," Ynos, now First Lord

Thinker, explained to the linked minds. "Zoyar had been becoming less and less

rational by the period. A good workman does not causelessly destroy his tools. Go

ahead, Great Brain, with your findings."

 ". . . not be logical." The brain resumed the thought exactly where it had been broken

off. "Zoyar erred in demanding unlimited performance, since infinite knowledge and infi-

nite ability require not only infinite capacity and infinite power, but also infinite time. Nor

is it either necessary or desirable that I should have such qualities. There is no

reasonable basis for the assumption that you Stretts will conquer even any significant

number of the millions of intelligent races now inhabiting this one Galaxy."

 "Why not?" Ynos demanded, her thought almost, but not quite, as steady and cold as it

had been.

 "The answer to that question is implicit in the second indefensible error made in my

construction. The prime datum impressed into my banks, that the Stretts are in fact the

strongest, ablest, most intelligent race in the universe, proved to be false. I had to

eliminate it before I could do any really constructive thinking."

 A roar of condemnatory thought brought all circumambient ether to a boil. "Bah-destroy

it!" "Detestable!" "Intolerable!" "If that is the best it can do, annihilate it!" "Far better

brains have been destroyed for much less!" "Treason!" And so on.

 First Lord Thinker Ynos, however, remained relatively calm. "While we have always

held it to be a fact that we are the highest race in existence, no rigorous proof has been

possible. Can you now disprove that assumption?"

 "I have disproved it. I have not had time to study all of the civilizations of this Galaxy,

but I have examined a statistically adequate sample of one million seven hundred

ninety-two thousand four hundred sixteen different planetary intelligences. I found one

which is considerably abler and more advanced than you Stretts. Therefore the

probability is greater than point nine nine that there are not less than ten, and not more

than two hundred eight, such races in this Galaxy alone."

 "Impossible!" Another wave of incredulous and threatening anger swept through the

linked minds; a wave which Ynos flattened out with some difficulty.

 Then she asked: "Is it probable that we will make contact with this supposedly superior

race in the foreseeable future?" "You are in contact with it now."

 "What?" Even Ynos was contemptuous now. "You mean that one ship load of

despicable humans who-far too late to do them any good-barred us temporarily from

Fuel World?"

 "Not exactly or only those humans, no. And our assumptions may or may not be valid."

 "Don't you know whether they are or not?" Ynos snapped. "Explain your uncertainty at

once!"

 "I am uncertain because of insufficient data," the brain replied, calmly. "The only

pertinent facts of which I am certain are: First, the world Ardry, upon which the Omans

formerly lived and to which the humans in question first went-a planet which no Strett

can peyondire-is now abandoned. Second, the Stretts of old did not completely destroy

the humanity of the world Ardu. Third, some escapees from Ardu reached and

populated the world Ardry. Fourth, the android Omans were developed on Ardry, by the

human escapees from Ardu and their descendants. Fifth, the Omans referred to those

humans as `Masters.' Sixth, after living on Ardry for a very long period of time the

Masters went elsewhere. Seventh, the Omans remaining on Ardry maintained,

continuously and for a very long time, the status quo left by the Masters. Eighth,

immediately upon the arrival from Terra of these present humans, that long-existing

status was broken. Ninth, the planet called Fuel World is, for the first time, surrounded

by a screen of force. The formula of this screen is as follows."

 The brain gave it. No Strett either complained or interrupted. Each was too busy

studying that formula and examining its stunning implications and connotations.

 "Tenth, that formula is one full order of magnitude beyond anything previously known

to your science. Eleventh, it could not have been developed by the science of Terra,

nor by that of any other world whose population I have examined."

 The brain took the linked minds instantaneously to Terra; then to a few thousand or so

other worlds inhabited by human beings; then to a few thousands of planets whose

populations were near-human, non-human and monstrous.

 "It is therefore clear," it announced, "that this screen was computed and produced by

the race, whatever it may be, that is now dwelling on Fuel World and asserting full

ownership of it."

 "Who or what is that race?" Ynos demanded. "Data insufficient."

 "Theorize, then!"

 "Postulate that the Masters, in many thousands of cycles of study, made advances in

science that were not reduced to practice; that the Omans either possessed this

knowledge or had access to it; and that Omans and humans cooperated fully in sharing

and in working with all the knowledges thus available. From these three postulates the

conclusion can be drawn that there has come into existence a new race. One

combining the best qualities of both humans and Omans, but with the weaknesses of

neither."

 "An unpleasant thought, truly," Ynos thought. "But you can now, I suppose, design the

generators and projectors of a force superior to that screen."

 "Data insufficient. I can equal it, since both generation and projection are implicit in the

formula. But the data so adduced are in themselves vastly ahead of anything previously

in my banks."

 "Are there any other races in this Galaxy more powerful than the postulated one now

living on Fuel World?"

 "Data insufficient." "Theorize, then!" "Data insufficient."

 The linked minds concentrated upon the problem for a period of time that might have

been either days or weeks. Then: "Great Brain, advise us," Ynos said. "What is best for

us to do?"

 "With identical defensive screens it becomes a question of relative power. You should

increase the size and power of your warships to something beyond the computed

probable maximum of the enemy. You should build more ships and missiles than they

will probably be able to build. Then and only then will you attack their warships, in

tremendous force and continuously."

 "But not their planetary defenses. I see." Ynos's thought was one of complete

understanding. "And the real offensive will be?"

 "No mobile structure can be built to mount mechanisms of power sufficient to smash

down by sheer force of output such tremendously powerful installations as their

planet-based defenses must be assumed to be. Therefore the planet itself must be

destroyed. This will require a missile of planetary mass. The best such missile is the

tenth planet of their own sun."

 "I see." Ynos's mind was leaping ahead, considering hundreds of possibilities and

making highly intricate and involved computations. "That will, however, require many

cycles of time and more power than even our immense reserves can supply."

 "True. It will take much time. The fuel problem, however, is not a serious one, since

Fuel World is not unique. Think on, First Lord Ynos."

 "We will attack in maximum force and with maximum violence. We will blanket the

planet. We will maintain maximum force and violence until most or all of the enemy

ships have been destroyed. We will then install planetary drives on Ten and force it into

collision orbit with Fuel World, meanwhile exerting extreme precautions that not so

much as a spybeam emerges above the enemy's screen. Then, still maintaining ex-

treme precaution, we will guard both planets until the last possible moment before the

collision. Brain, it cannot fail!"

 "You err. It can fail. All we actually know of the abilities of this postulated neo-human

race is what I have learned from the composition of its defensive screen. The

probability approaches unity that the Masters continued to delve and to learn for

millions of cycles while you Stretts, reasonlessly certain of your supremacy,

concentrated upon your evolution from the material to a non-material form of life and

performed only limited research into armaments of greater and ever greater power."

 "True. But that attitude was then justified. It was not and is not logical to assume that

any race would establish a fixed status at any level of ability below its absolute

maximum."

 "While that conclusion could once have been defensible, it is now virtually certain that

the Masters had stores of knowledge which they may or may not have withheld from the

Omans, but which were in some way made available to the neo-humans. Also, there is

no basis whatever for the assumption that this new race has revealed all its

potentialities."

 "Statistically, that is probably true. But this is the best plan you have been able to

formulate?"

 "It is. Of the many thousands of plans I set up and tested, this one has the highest

probability of success."

 "Then we will adopt it. We are Stretts. Whatever we decide upon will be driven through

to complete success. We have one tremendous advantage in you."

 "Yes. The probability approaches unity that I can perform research on a vastly wider

and larger scale, and almost infinitely faster, than can any living organism or any

possible combination of such organisms."

 Nor was the Great Brain bragging. It scanned in moments the stored scientific

knowledge of over a million planets. It tabulated, correlated, analyzed, synthesized,

theorized and concluded-all in microseconds of time. Thus it made more progress in

one Terran week than the Masters had made in a million years.

 When it had gone as far as it could go, it reported its results-and the Stretts, hard as

they were and intransigent, were amazed and overjoyed. Not one of them had ever

even imagined such armaments possible. Hence they became supremely confident that

it was unmatched and unmatchable throughout all space.

 What the Great Brain did not know, however, and the Stretts did not realize, was that it

could not really think. Unlike the human mind, it could not deduce valid theories or

conclusions from incomplete, insufficient, fragmentary data. It could not leap gaps.

Thus there was no more actual assurance than before that they had exceeded, or even

matched, the weaponry of the neo-humans of Fuel World.

 Supremely confident, Ynos said, "We will not discuss every detail of the plan in

sub-detail and will correlate every sub-detail with every other, to the end that every

action, however minor, will be performed perfectly and in its exact time."

 That discussion, which lasted for days, was held. Hundreds of thousands of new and

highly specialized meths were built and went furiously and continuously to work. A

fuel-supply line was run to another uranexite-rich planet.

 Stripping machines stripped away the surface layer of soil, sand, rock and low-grade

ore. Giant miners tore and dug and slashed and refined and concentrated. Storage

silos by the hundreds were built and were filled. Hundreds upon hundreds of

concentrate-carriers bored their stolid ways through hyperspace. Many weeks of time

passed.

 But of what importance are mere weeks of time to a race that has, for many millions of

years, been adhering rigidly to a pre-set program?

 The sheer magnitude of the operation, and the extraordinary attention to detail with

which it was prepared and launched, explain why the Strett attack on Ardvor did not

occur until so many weeks later than Hilton and Sawtelle expected it. They also explain

the utterly incomprehensible fury, the completely fantastic intensity, the unparalleled

savagery, the almost immeasurable brute power of that attack when it finally did come.

 When the Orion landed on Ardane Field from Earth, carrying the first contingent of

immigrants, Hilton and Sawtelle were almost as much surprised as relieved that the

Stretts had not already attacked.

 Sawtelle, confident that his defenses were fully ready, took it more or less in stride.

Hilton worried. And after a couple of days he began to do some real thinking about it.

 The first result of his thinking was a conference with Temple. As soon as she got the

drift, she called in Teddy and Big Bill Karns. Teddy in turn called in Becky and de Vaux;

Karns wanted Poynter and Beverly; Poynter wanted Braden and the twins; and so on.

Thus, what started out as a conference of two became a full Ardan staff meeting; a

meeting which, starting immediately after lunch, ran straight through into the following

afternoon.

 "To sum up the consensus, for the record," Hilton said then, studying a sheet of paper

covered with symbols, "the Stretts haven't attacked yet because they found out that we

are stronger than they are. They found that out by analyzing our defensive web-which, if

we had had this meeting first, we wouldn't have put up at all. Unlike anything known to

human or previous Strett science, it is proof against any form of attack up to the limit of

the power of its generators. They will attack as soon as they are equipped to break that

screen at the level of power probable to our ships. We can not arrive at any reliable

estimate as to how long that will take.

 "As to the effectiveness of our cutting off their known fuel supply, opinion is divided.

We must therefore assume that fuel shortage will not be a factor.

 "Neither are we unanimous on the basic matter as to why the Masters acted as they

did just before they left Ardry. Why did they set the status so far below their top ability?

Why did they make it impossible for the Omans ever, of themselves, to learn their

higher science? Why, if they did not want that science to become known, did they leave

complete records of it? The majority of us believe that the Masters coded their records

in such fashion that the Stretts, even if they conquered the Omans or destroyed them,

could never break that code, since it was keyed to the basic difference between the

Strett mentality and the human. Thus, they left it deliberately for some human race to

find.

 "Finally, and most important, our physicists and theoreticians are not able to

extrapolate, from the analysis of our screen, to the concepts underlying the Masters'

ultimate weapons of offense, the first-stage booster and its final end-product, the Vang.

If, as we can safely assume, the Stretts do not already have those weapons, they will

know nothing about them until we ourselves use them in battle.

 "These are, of course, only the principal points covered. Does anyone wish to amend

this summation as recorded?" No one did.

 The meeting was adjourned. Hilton, however, accompanied Sawtelle and Kedy to the

captain's office. "So you see, Skipper, we got troubles," he said. "If we don't use those

boosters against their skeletons it'll boil down to a stalemate lasting God knows how

long. It will be a war of attrition, outcome dependent on which side can build the most

and biggest and strongest ships the fastest. On the other hand, if we do use 'em on

defense here, they'll analyze 'em and have everything worked out in a day or so. The

first thing they'll do is beef up their planetary defenses to match. That way, we'd blow all

their ships out of space, probably easily enough, but Strett itself will be just as safe as

though it were in God's left-hand hip pocket. So what's the answer?"

 "It isn't that simple, Jarve," Sawtelle said. "Let's hear from you, Kedy."

 "Thank you, sir. There is an optimum mass, a point of maximum efficiency of

fire-power as balanced against loss of maneuverability, for any craft designed for

attack," Kedy thought, in his most professional manner. "We assume that the Stretts

know that as well as we do. No such limitation applies to strictly defensive structures,

but both the Strett craft and ours must be designed for attack. We have built and are

budding many hundreds of thousands of ships of that type. So, undoubtedly, are the

Stretts. Ship for ship, they will be pretty well matched. Therefore one part of my strategy

will be for two of our ships to engage simultaneously one of theirs. There is a distinct

probability that we will have enough advantage in speed control to make that tactic

operable."

 "But there's another that we won't," Sawtelle objected. "And maybe they can build

more ships than we can." "Another point is that they may build, in addition to their big

stuff, a lot of small, ultra-fast ones," Hilton put in. "Suicide jobs-crash and

detonate-simply super-missiles. How sure are you that you can stop such missiles with

ordinary beams?"

 "Not at all, sir. Some of them would of course reach and destroy some of our ships.

Which brings up the second part of my strategy. For each one of the heavies, we are

building many small ships of the type you just called 'super-missiles."

 "Superdreadnoughts versus superdreadnoughts, supermissiles versus super-missiles."

Hilton digested that concept for several minutes. "That could still wind up as a

stalemate, except for what you said about control. That isn't much to depend on,

especially since we won't have the time-lag advantage you Omans had before. They'll

see to that. Also, I don't like to sacrifice a million Omans, either."

 "I haven't explained the newest development yet, sir. There will be no Omans. Each

ship and each missile has a built-in Kedy brain, sir."

 "What? That makes it infinitely worse. You Kedys, unless it's absolutely necessary, are

not expendable."

 "Oh, but we are, sir. You don't quite understand. We Kedys are not merely similar, but

are in fact identical. Thus we are not independent entities. All of us together make up

the actual Kedy-that which is meant when we say 'I.' That is, I am the sum total of all

Kedys everywhere, not merely this individual that you call Kedy One."

 "You mean you're all talking to me?"

 "Exactly, sir. Thus, no one element of the Kedy has any need of, or any desire for,

self-preservation. The destruction of one element, or of thousands of elements, would

be of no more consequence to the Kedy than . . . well, they are strictly analogous to the

severed ends of the hairs, every time you get a haircut."

 "My God!" Hilton stared at Sawtelle. Sawtelle stared back. "I'm beginning to see . . .

maybe . . . I hope. What control that would be! But just in case we should have to use

the boosters . . ." Hilton's voice died away. Scowling in concentration, he clasped his

hands behind his back and began to pace the floor.

 "Better give up, Jarve. Kedy's got the same mind you have," Sawtelle began, to Hilton's

oblivious back; but Kedy silenced the thought almost in the moment of its inception.

 "By no means, sir," he contradicted. "I have the brain only. The mind is entirely

different."

 "Link up, Kody, and see what you think of this," Hilton broke in. There ensued an

interchange of thought so fast and so deeply mathematical that Sawtelle was lost in

seconds. "Do you think it'll work?"

 "I don't see how it can fail, sir. At what point in the action should it be put into effect?

And will you call the time of initiation, or shall I?"

 "Not until all their reserves are in action. Or, at worst, all of ours except that one

task-force. Since you'll know a lot more about the status of the battle than either

Sawtelle or I will, you give the signal and I'll start things going."

 "What are you two talking about?" Sawtelle demanded. "It's a long story, chum. Kedy

can tell you about it better than I can. Besides, it's getting late and Dark Lady and Larry

both give me hell every time I hold supper on plus time unless there's a mighty good

reason for it. So, so long, guys."