wn. The markings
appeared to parallel his central nervous system. It seemed reasonable
that it operated by induction.

That meant it involved chiefly tactile sensations, unless, of course,
there were other factors he didn't know about. He felt his forehead
carefully, his temples, and his skull around his ears. Nothing, but that
didn't mean that infinitesimal holes hadn't been drilled through his
skull and taps run to the optic and auditory nerves.

It could be done and he wouldn't know about it, couldn't feel it. The
broadcasting circuits could then be spread over his head, or, for that
matter, over any part of his body.

If his suppositions were correct, then he was a living, walking
broadcasting station. Everything he felt, saw or heard was relayed to
some central mechanism which could interpret the signals.

The police.

Cobber had been looking for a spy mechanism, a mechanical device in
Jadiver's body. He hadn't found it, but it was there, almost impossible
to locate. A surgeon might find it by performing an autopsy, but even
then he would have to know what to look for.

How Jadiver had been able to find it was a pure puzzle. Obviously, the
police hadn't been as thorough as they had meant to be. Their mechanism
had somehow gone awry at precisely the time Jadiver was most conscious
of his skin. Without the itch, he would never have noticed it.

At least one thing was clear now--the purpose. He'd been boiled into
unconsciousness, his skin removed, the circuit put in place, and then
had the synthetic substance carefully fitted over his body.

His tension increased, for he knew now that he had betrayed Burlingame
without meaning to--but it was betrayal nonetheless. It wasn't only a
question of professional ethics; it was how long he would remain alive.
Burlingame's survivors, if there were any, would have an excellent idea
of who was responsible.

This thing went with him wherever he went. Did it also sleep when he
did? That wasn't important, really.

He had to try to warn Burlingame.

Even these thoughts might be a mistake. The police might know what he
was thinking. This was one way to determine whether there was such a
thing as mechanically induced telepathy, but he couldn't work up much
enthusiasm for the experiment.

His own problem was essentially the same as if a mechanical spying
device had been planted in him--with one difference. A mechanical part
was a foreign object and could be cut out by any