s body and leaned as far back against his
captor as he could, and then suddenly lunged forward. The result was
as satisfactory as he could possibly have hoped. The great weight
of the ape-man thrown suddenly out from an erect position caused
the other also to lunge violently forward with the result that to
save himself he involuntarily released his grasp. Catlike in his
movements, the ape-man had no sooner touched the roof than he was
upon his feet again, facing his adversary, a man almost as large
as himself and armed with a saber which he now whipped from its
scabbard. Tarzan, however, had no mind to allow the use of this
formidable weapon and so he dove for the other's legs beneath the
vicious cut that was directed at him from the side, and as a football
player tackles an opposing runner, Tarzan tackled his antagonist,
carrying him backward several yards and throwing him heavily to
the roof upon his back.

No sooner had the man touched the roof than the ape-man was upon
his chest, one brawny hand sought and found the sword wrist and
the other the throat of the yellow-tunicked guardsman. Until then
the fellow had fought in silence but just as Tarzan's fingers
touched his throat he emitted a single piercing shriek that the
brown fingers cut off almost instantly. The fellow struggled to
escape the clutch of the naked creature upon his breast but equally
as well might he have fought to escape the talons of Numa, the
lion.

Gradually his struggles lessened, his pin-point eyes popped from
their sockets, rolling horribly upward, while from his foam-flecked
lips his swollen tongue protruded. As his struggles ceased Tarzan
arose, and placing a foot upon the carcass of his kill, was upon
the point of screaming forth his victory cry when the thought that
the work before him required the utmost caution sealed his lips.

Walking to the edge of the roof he looked down into the narrow,
winding street below. At intervals, apparently at each street
intersection, an oil flare sputtered dimly from brackets set
in the walls a trifle higher than a man's head. For the most part
the winding alleys were in dense shadow and even in the immediate
vicinity of the flares the illumination was far from brilliant.
In the restricted area of his vision he could see that there were
still a few of the strange inhabitants moving about the narrow
thoroughfares.

To prosecute his search for the young officer and the girl he must
be able to move a