ries of use, rose before them, to disappear at a sharp turning of
the passage a few yards ahead.

Into this narrow alley Tarzan made his way, turning his giant shoulders
sideways that they might enter at all. Behind him trailed his black
warriors. At the turn in the cleft the stairs ended, and the path was
level; but it wound and twisted in a serpentine fashion, until suddenly
at a sharp angle it debouched upon a narrow court, across which loomed
an inner wall equally as high as the outer. This inner wall was set
with little round towers alternating along its entire summit with
pointed monoliths. In places these had fallen, and the wall was
ruined, but it was in a much better state of preservation than the
outer wall.

Another narrow passage led through this wall, and at its end Tarzan and
his warriors found themselves in a broad avenue, on the opposite side
of which crumbling edifices of hewn granite loomed dark and forbidding.
Upon the crumbling debris along the face of the buildings trees had
grown, and vines wound in and out of the hollow, staring windows; but
the building directly opposite them seemed less overgrown than the
others, and in a much better state of preservation. It was a massive
pile, surmounted by an enormous dome. At either side of its great
entrance stood rows of tall pillars, each capped by a huge, grotesque
bird carved from the solid rock of the monoliths.

As the ape-man and his companions stood gazing in varying degrees of
wonderment at this ancient city in the midst of savage Africa, several
of them became aware of movement within the structure at which they
were looking. Dim, shadowy shapes appeared to be moving about in the
semi-darkness of the interior. There was nothing tangible that the eye
could grasp--only an uncanny suggestion of life where it seemed that
there should be no life, for living things seemed out of place in this
weird, dead city of the long-dead past.

Tarzan recalled something that he had read in the library at Paris of a
lost race of white men that native legend described as living in the
heart of Africa. He wondered if he were not looking upon the ruins of
the civilization that this strange people had wrought amid the savage
surroundings of their strange and savage home. Could it be possible
that even now a remnant of that lost race inhabited the ruined grandeur
that had once been their progenitor? Again he became conscious of a
stealthy movement within t