that they can't hide it.
Twenty thousand witnesses! When it comes to getting things done you're
the best we have!"

The little man grinned. "But you're the one who knows how to pick
recruits and organize our concepts. This is how it worked. I re-fed
the emptied cryotron memory box of a robot discard with patterns to
deal with anything it was likely to encounter in a destruction pile. I
kept the absolute-freeze mechanism in working order, but developed a
shield that would hide its activity from the best pile detector." He
spread a large tissue schematic out on the floor and they all
gathered around it to study the details. "Now, the important thing was
to have an external element that could resume contact with a wider
circuit, which could in turn start meshing with the whole robot
mechanism and then through that mechanism into the pile. This little
lever made the contact at a pre-fed time."

Miss Wright was enthusiastic. "That contact is half the size of any
I've been able to make. It's crucially important," she added to Hart.
"A large contact can look suspicious."

While others took miniphotos of the schematic, Hart studied the
contact carefully. "I think I can reduce its size by another fifty per
cent. Alloys are one of my specialties--when I get a chance to work at
them."

"That would be ideal," said Burnett. "Then we could set up many more
discarded robots without risk. How long will it take?"

"I can rough it out right now." He scribbled down the necessary
formulas and everyone photographed that too.

[Illustration]

"Maximum security is now in effect," announced Burnett. "You will
destroy your copies as soon as you have transferred them to edible
base copies. At the first hint of danger you will consume them. Use
home enlargers for study. In no case are you to make permanent
blowups that would be difficult to destroy quickly." He considered
them sternly. "Remember, you are running a great risk. You're not only
opposing the will of the state but the present will of the vast
majority of citizens."

"If there are as many other underground groups as you indicate," said
Hart, "they should have this information."

"We get it to them," answered Burnett. "I'm going on health leave from
my job."

"And what will be your excuse?" Wright demanded anxiously.

"Nervous shock," smiled their leader. "After all, I did see today's
events in the Plaza."

* * * * *

When Hart reached