n invalid."

"That's the trouble with radiation damage, Mrs. Stanton. Even when we can
save the victim's life, we cannot always save his health.

"You can see, I think, what sort of psychic disturbances this can bring
about in such a pair. The ill boy tends to identify with the well one and,
unfortunately, the reverse is true. If they are not properly handled
during their formative years, Mrs. Stanton, both can be badly damaged
emotionally."

"I ... I think I understand," the woman said. "But what sort of thing
should I look out for?"

"I suggest that you get a good man in psychic development," the doctor
said. "I'd hesitate to prescribe. It's out of my field. But, in general,
most of your trouble will be caused by a tendency for the pair to swing
into one of two extremes.

"Mutual antagonism can arise if one becomes jealous of the other's health,
while the healthy one becomes jealous of the extra consideration shown his
crippled brother.

"Or, on the other hand, the healthy boy may identify so closely with his
brother that he feels every hurt or slight, real or imagined. He becomes
over-solicitous, over-protective. At the same time, the other brother may
come to depend completely on the healthy twin.

"In both these situations, there is a positive feedback which constantly
worsens the situation. It requires a great deal of careful observation and
careful application of the proper educational stimuli to keep the
situation from developing toward either extreme. You'll need expert help,
if you want both boys to display the full abilities of which they are
potentially capable."

"I see. Could you give me the name of a good man, Doctor?"

The doctor nodded and picked up a book on his desk. "I'll give you several
names. You can pick the one you like. They're all good men. There are many
good women in the field, too, but in this case, I think a man would be
best. Of course, if one of them thinks a woman is indicated, that's up to
him. As I said, that isn't my field."

He opened the small book and riffled through it to find the names he
wanted.

V

The image of the Nipe on the glowing screen was clear and finely detailed.
It was, Bart thought, as though one were looking through a window into the
Nipe's nest itself. Only the tremendous depth of focus of the lens which
caught the picture gave the illusion a sense of unreality.
Everything--background and foreground alike--was sharply in focus.

The Nipe moved i