oad leaf, Tarzan's keen nose
caught the faint trace of the scent spoor of Toog, where the leaf had
brushed a hairy shoulder as the great ape passed through the foliage.

Once again the two took up the trail, but it was slow work now and
there were many discouraging delays when the spoor seemed lost beyond
recovery. To you or me there would have been no spoor, even before the
coming of the rain, except, possibly, where Toog had come to earth and
followed a game trail. In such places the imprint of a huge handlike
foot and the knuckles of one great hand were sometimes plain enough for
an ordinary mortal to read. Tarzan knew from these and other
indications that the ape was yet carrying Teeka. The depth of the
imprint of his feet indicated a much greater weight than that of any of
the larger bulls, for they were made under the combined weight of Toog
and Teeka, while the fact that the knuckles of but one hand touched the
ground at any time showed that the other hand was occupied in some
other business--the business of holding the prisoner to a hairy
shoulder. Tarzan could follow, in sheltered places, the changing of
the burden from one shoulder to another, as indicated by the deepening
of the foot imprint upon the side of the load, and the changing of the
knuckle imprints from one side of the trail to the other.

There were stretches along the surface paths where the ape had gone for
considerable distances entirely erect upon his hind feet--walking as a
man walks; but the same might have been true of any of the great
anthropoids of the same species, for, unlike the chimpanzee and the
gorilla, they walk without the aid of their hands quite as readily as
with. It was such things, however, which helped to identify to Tarzan
and to Taug the appearance of the abductor, and with his individual
scent characteristic already indelibly impressed upon their memories,
they were in a far better position to know him when they came upon him,
even should he have disposed of Teeka before, than is a modern sleuth
with his photographs and Bertillon measurements, equipped to recognize
a fugitive from civilized justice.

But with all their high-strung and delicately attuned perceptive
faculties the two bulls of the tribe of Kerchak were often sore pressed
to follow the trail at all, and at best were so delayed that in the
afternoon of the second day, they still had not overhauled the
fugitive. The scent was now strong, for it had been