As Tarzan entered the building he was distinctly aware of many
eyes upon him. There was a rustling in the shadows of a near-by
corridor, and he could have sworn that he saw a human hand withdrawn
from an embrasure that opened above him into the domelike rotunda
in which he found himself.

The floor of the chamber was of concrete, the walls of smooth
granite, upon which strange figures of men and beasts were carved.
In places tablets of yellow metal had been set in the solid masonry
of the walls.

When he approached closer to one of these tablets he saw that it
was of gold, and bore many hieroglyphics. Beyond this first chamber
there were others, and back of them the building branched out into
enormous wings. Tarzan passed through several of these chambers,
finding many evidences of the fabulous wealth of the original
builders. In one room were seven pillars of solid gold, and in
another the floor itself was of the precious metal. And all the
while that he explored, his blacks huddled close together at his
back, and strange shapes hovered upon either hand and before them
and behind, yet never close enough that any might say that they
were not alone.

The strain, however, was telling upon the nerves of the Waziri.
They begged Tarzan to return to the sunlight. They said that no
good could come of such an expedition, for the ruins were haunted
by the spirits of the dead who had once inhabited them.

"They are watching us, O king," whispered Busuli. "They are