m in his scalp; but the autopsy shows that it came
from outside somewhere."

"It's part of Barter's radio control," muttered Bentley, "it _must_
be! It has to be ... and I didn't think of looking for it at the
time."

- - -

Long before sunrise Bentley and Tyler repaired to the office of Saret
Balisle, letting themselves in with keys which had been furnished them
last night. It had been decided that Balisle would not try to run away
from the threat of the Mind Master, but would be in his office as
usual. If he ran, and got out of touch with the police, Barter would
get him anyway and nobody would be the wiser.

Balisle had grinned and shrugged his shoulders, but the wanness in his
cheeks showed that he didn't take the threats lightly, considering
what it was thought had happened to Harold Hervey.

"I wonder," said Tyler as they walked through the cool of the morning
to the Clinton Building on lower Fifth Avenue, where Balisle had his
offices, "how Barter keeps his apes with men's brains from trying to
break away from him when he has to divert his mental control to other
channels?"

Bentley hesitated, seeking a logical answer. It seemed simple enough
when the answer came to his mind.

"Suppose, Tyler," he said, "that you wakened from a nightmare and
looked into a mirror to discover that you were an anthropoid ape? That
you were incapable of speaking, of using your hands save in the
clumsiest fashion? When it came home to you what had happened to you,
would you rush right out into the street, hoping that the people on
the sidewalks would understand that you were a man in ape's
clothing?"

"Good Lord! I never thought of that!"

"You would if you'd ever been an ape. I know the feeling."

"Then Barter's manapes are more surely prisoners than if they were
sentenced to serve their entire lives in the deepest solitary cells in
Sing Sing! How horrible--but still, they yet would have a way of
escape."

"Yes, simply break out and start running, knowing that the crowd would
soon take and destroy them. Right enough--but even when one knows
oneself an ape it isn't easy to destroy oneself."

- - -

They entered the offices of Saret Balisle and looked about them. It
was just an ordinary office. They looked in clothes closets and in
shadowy corners. They took every possible precaution in their survey
of the situation. They looked for hidden instruments of destruction.
They looked for hidden d