the necessities of his early life, where survival itself depended
almost daily upon the exercise of the keenest vigilance and the
constant use of all his faculties.

And so he followed the old trail of the Belgian through the forest
and toward the north; but because of the age of the trail he was
constrained to a far from rapid progress. The man he followed was
two days ahead of him when Tarzan took up the pursuit, and each
day he gained upon the ape-man. The latter, however, felt not
the slightest doubt as to the outcome. Some day he would overhaul
his quarry--he could bide his time in peace until that day dawned.
Doggedly he followed the faint spoor, pausing by day only to kill
and eat, and at night only to sleep and refresh himself.

Occasionally he passed parties of savage warriors; but these he
gave a wide berth, for he was hunting with a purpose that was not
to be distracted by the minor accidents of the trail.

These parties were of the collecting hordes of the Waziri and
their allies which Basuli had scattered his messengers broadcast to
summon. They were marching to a common rendezvous in preparation
for an assault upon the stronghold of Achmet Zek; but to Tarzan
they were enemies--he retained no conscious memory of any friendship
for the black men.

It was night when he halted outside the palisaded village of the
Arab raider. Perched in the branches of a great tree he gazed
down upon the life within the enclosure. To this place had the
spoor led him. His quarry must be within; but how was he to find
him among so many huts? Tarzan, although cognizant of his mighty