piercing the still heart.

It does not take a great deal of this manner of warfare to get
upon the nerves of white men, and so it is little to be wondered at
that the Manyuema were soon panic-stricken. Did one forge ahead an
arrow found his heart; did one lag behind he never again was seen
alive; did one stumble to one side, even for a bare moment from
the sight of his fellows, he did not return--and always when they
came upon the bodies of their dead they found those terrible arrows
driven with the accuracy of superhuman power straight through the
victim's heart. But worse than all else was the hideous fact that
not once during the morning had they seen or heard the slightest
sign of an enemy other than the pitiless arrows.

When finally they returned to the village it was no better. Every
now and then, at varying intervals that were maddening in the
terrible suspense they caused, a man would plunge forward dead.
The blacks besought their masters to leave this terrible place, but
the Arabs feared to take up the march through the grim and hostile
forest beset by this new and terrible enemy while laden with the
great store of ivory they had found within the village; but, worse
yet, they hated to leave the ivory behind.

Finally the entire expedition took refuge within the thatched
huts--here, at least, they would be free from the arrows. Tarzan,
from the tree above the village, had marked the hut into which the
chief Arabs had gone, and, balancing himself upon an overhanging
limb, he drove his heavy spear with all the force of his giant
muscles through the thatched roof. A howl of pain told him that it
had found a mark. With this parting salute to convince them that