"Watch the wall at your end of the chamber, Tars Tarkas,"
I cautioned, "it is through secret doorways in the wall that the
brutes are loosed upon us." I was very close to him and spoke
in a low whisper that my knowledge of their secret might not be
disclosed to our tormentors.

As long as we remained each facing an opposite end of the apartment
no further attacks were made upon us, so it was quite clear to me
that the partitions were in some way pierced that our actions might
be observed from without.

At length a plan of action occurred to me, and backing quite close
to Tars Tarkas I unfolded my scheme in a low whisper, keeping my
eyes still glued upon my end of the room.

The great Thark grunted his assent to my proposition when I had
done, and in accordance with my plan commenced backing toward the
wall which I faced while I advanced slowly ahead of him.

When we had reached a point some ten feet from the secret doorway
I halted my companion, and cautioning him to remain absolutely
motionless until I gave the prearranged signal I quickly turned
my back to the door through which I could almost feel the burning
and baleful eyes of our would be executioner.

Instantly my own eyes sought the mirror upon Tars Tarkas' back and
in another second I was closely watching the section of the wall
which had been disgorging its savage terrors upon us.

I had not long to wait, for presently the golden surface commenced