motionless above his cities, giving no hint they knew of his existence.
12
But none was needed: not by chance alone could those mighty
ships have come to rest so precisely over New York, London, Paris, Moscow, Rome, Cape Town, Tokyo,
Canberra....
Even before the ending of those heart-freezing days, some men had guessed the truth. This was not
the first tentative contact by a race which knew nothing of man. Within those silent, unmoving
ships, master psychologists were studying humanity's reactions. When the curve of tension had
reached its peak, they would act.
A.nd on the sixth day Karellen, Supervisor for Earth, made himself known to the world in a
broadcast that blanketed every radio frequency. He spoke in English so perfect that the
controversy it began was to rage across the Atlantic for a generation. But the context of the
speech was more staggering even than its delivery. By any standards, it was a work of superlative
genius, showing a complete and absolute mastery of human affairs. There could be no doubt that its
scholarship and virtuosity, its tantali7ing glimpses of knowledge still untapped were deliberately
designed to convince mankind that it was in the presence of overwhelming intellectual power. When
Karellen had finished, the nations of Earth knew that their days of precarious sovereignty had
ended. Local, internal governments would still retain their powers, but in the wider field of
international affairs the supreme decisions had passed from human hands. Arguments-protests-all
were futile.
It was hardly to be expected that all the nations of the world would submit tamely to such a
limitation of their powers. Yet active resistance presented baffling difficulties, for the
destruction of the Overlords' ships, even if it could be achieved, would annihilate the cities
beneath them. Nevertheless, one major power had made the attempt. Perhaps those responsible hoped
to kill two birds with one atomic missile, for their target was floating above the capital of an
adjoining and unfriendly nation.
As the great ship's image had expanded on the television screen in the secret control room, the
little group of officers and technicians must have been torn by many emotions. If they succeeded-
what action would the remaining ships take?
Could they also be destroyed, leaving humanity to go its own way once more? Or would Kardllen
wreak some frightful vengeance upon those who had attacked him?
The screen became suddenly blank as the missile destroyed
13
itself on impact, and the picture switched immediately to an airborne camera many miles away. In
the fraction of a second that had elapsed, the fireball should already have formed and should be
filling the sky with its solar flame.
Yet nothing whatsoever had happened. The great ship floated unharmed, bathed in the raw sunlight
at the edge of space. Not only had the bomb failed to touch it, but no-one could ever decide what
had happened to the missile. Moreover, Karellen took no action against those responsible, or~ even
indicated that he had known of the attack. He ignored them contemptuously, leaving them to worry
over a vengeance that never came. It was a more effective, and more demoralizing, treatment than
any punitive action could have been. The government responsible collapsed completely in mutual
recrimination a few weeks later.
There had also been some passive resistance to the policy of the Overlords. Usually, Karellen had
been able to deal with it by letting those concerned have their own way, until they had discovered
that they were only hurting themselves by their refusal to co-operate. Only once had he taken any
direct action against a recalcitrant government.
For more than a hundred years, the Republic of South Africa had been the centre of social strife.
Men of good will on both sides had tried to build a bridge, but in vain-fears and prejudices were
too deeply ingrained to permit any cooperation. Successive governments had differed only by the
degree of their intolerance; the land was poisoned with hate and the aftermath of civil war.
When it became clear that no attempt would be made to end discrimination, K.arellen gave his
warning. It merely named a date and time-no more. There was apprehension, but little fear or
panic, for no-one believed that the Overlords would take any violent or destructive action which
would involve innocent and guilty alike.
Nor did they. All that happened was that as the sun passed the meridian at Cape Town-it went out.
There remained visible merely a pale, purple ghost, giving no heat or light. Somehow, out in
space, the light of the sun had been polarized by two crossed fields so that no radiation could
pass. The area affected was five hundred kilometres across, and perfectly circular.
The demonstration lasted thirty minutes. It was sufficient:
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