information. He had to find out,
and there was only one way that suggested itself.

Luise was still in there, but not in physical danger. The police were
lax about other things, but not about murder, and the man knew that.
She might lose her memories of the past few weeks; regrettable if it
happened, but not a catastrophe.

[Illustration]

But who was the man and what was his connection?

He spent the rest of the day buying equipment--not much, but his money
dwindled rapidly. He considered going back to the Shelter and then
decided against it. By this time Luise would be back, and he would be
tempted not to leave her.

After dark, when the lights in the offices went out, he rented an
aircar and set it down on the top of the building.

* * * * *

He walked across the roof, estimating the distances with practiced
ease, as if he'd undergone extensive training and the apprenticeship
period had been forgotten and only the skill remained. He knelt and
fused two small rods to a portion of the roof, and then readjusted the
torch and cut a small circular hole. He listened, and when there was
no alarm, lifted out the section. There was nothing but darkness
below.

He fastened a rope to the aircar. He dropped the rope through the hole
and slid down. Unless he had miscalculated, he was where he wanted to
be, having bypassed all alarm circuits. There were others inside, he
was reasonably certain of that, but with ordinary precautions he
could avoid them.

He flashed on a tiny light. He had guessed right; this was MEMORY
LAB--the room he'd wanted to see this afternoon but hadn't been able
to. In front of him was the door to the waiting room, and beyond that
the hall. He swung the light in an arc, flashing it over a desk and a
piece of equipment the nature of which he didn't know. Behind him was
still another door.

The desk was locked, but he took out a small magnetic device and
jiggled it expertly over the concealed mechanism and then it was
unlocked. He went hurriedly through papers and documents, but there
was nothing with a name on it. He rifled the desk thoroughly and then
went to the machine.

He didn't expect to learn anything, but he might as well examine it.
There was a place for a patient to sit, and a metal hood to fit over
the patient's head. He snapped the hood open and peered into it. It
seemed to have two functions. One circuit was far larger and more
complicated, and he c