d in Kalechi's
laboratories, were Satog copies of embryonic human beings. This stage
was comprised of approximately twelve hundred individuals who were now
permitted to mature and were schooled individually in complete isolation
by Satog teachers. They were indoctrinated with their purpose in
life ... the destruction of our populations ... and trained fully in
the manner of accomplishing it.

"Eventually, each was shipped to a Federation world. Cover identities as
obscure Federation citizens with backgrounds and records had been
prepared. The final instructions given these agents were simple. They
were to do nothing to draw attention to themselves, make no attempt to
contact one another. They were to create their stocks of lethal
organisms, provide methods of distribution and, on a selected day, three
Federation years away, release the floods of death."

* * * * *

The voice paused briefly, went on. "It is a sobering reflection that
this plan--an attack by a comparatively minor race with one specialized
skill on the greatest human civilization in history--might very well
have been appallingly successful. But the Great Satogs failed, in part
because of the very perfection of their work.

"From the human beings on board Ohl Cantrall's captured survey ship the
Satog scientists selected Cantrall himself and two female technicians on
his staff as the models to be followed in developing Kalechi's
pseudohumanity. In the twelve hundred members of the group sent to the
Federation ninety years later, these three identity-patterns are
recognizable. They appear in varying degrees of combination, but an
occasional individual will show only one or the other of the three
patterns involved.

"Ohl Cantrall was regarded as a great man in his time, and his
identification pattern is on record. That was the detail which first
revealed the plot. When three duplicates of that particular
pattern--and a considerable number of approximate duplicates--turned up
simultaneously in identification banks at widely separated points in the
Federation, it aroused more than scientific curiosity. Our security
system has learned to look with suspicion on apparent miracles. The
unsuspecting 'Cantralls' were located and apprehended at once; the
threat to the Federation was disclosed; and an intensive though
unpublicized search for the scattered group of Kalechi agents began
immediately...."

The voice paused again.

Th