looked around, he was over-joyed at his
apparent success in putting across the idea. All over the room the
animal-men were repeating his show in its various phases.

"Now I've got to take the disk out of one of them," said Clee, "and
it's a mighty dangerous thing to attempt! You see how easily their
emotions are aroused. If I hurt too much--!"

"I know," responded Jim, "but we've got to risk it, for if we succeed
we've got a good bunch of tough fighters at our backs. We need every
bit of help we can get!"

Carefully they made their few preparations, and Clee, again by acting,
indicated to one of the animal-men what he wanted to do. He seemed to
make himself well understood, for without hesitation the creature lay
face down on the floor. The others all gathered around as Clee bent
over it, and Jim scanned their faces closely for any sign of suspicion
or resentment. Seeing none, he told Clee to start; then held his
breath in awful suspense.

The disk appeared near the surface, and with a quick slice Clee made
his first incision. With the cut, the prone slave bucked and snarled.
Clee murmured soothing words to it in English, and, as the creature
quieted down, made another cut. Again came the bucking and throaty
protest; and this time, to Jim's dismay, he saw in the bestial faces
of the animal-men around them a sympathetic swing of emotional
protest. A little more, now; and Clee would be able to take the disk
out; but would the slaves restrain themselves until then?

Again Clee allowed the brute body under him to calm down. Then, as he
was about to cut once more, from somewhere above in the space ship
came the piercing scream of a woman. Something was happening to
Vivian.

* * * * *

Clee half started to rise, to run to her aid, but he forced himself to
be reasonable. Weaponless, visible, he could never hope to rescue an
invisible girl from someone he couldn't even see. He was on the point
of making valuable allies; in just a few moments more--! He decided to
hurry through with the job he had undertaken.

All below had heard the scream. The circle around him was shifting
uncertainly, and peculiar sounds were coming out of the brutes'
twisting mouths as he bent again over their fellow on the floor.

Clee's hand was trembling like an aspen leaf as he prepared to make
the next incision. He was completely unnerved, and with the utmost
efforts of his will he was unable to control the nai