It struck the parapet like a thirteen-inch shell, smashed out two yards of wall, and vanished in the depths. And after it, sliding, rattling and bouncing down, followed a rain of pebbles, fragments and detritus.

“Those two above--they're attacking!” shouted Stern. “Quick--after them! You, you, you!

He told off half a dozen men with rifles and revolvers.

“Quick, before they can hide! Look out for their darts! Kill! Kill!

The detachment started up the path at a run, eager for the hunt.

Stern set the flaring torch to the first fireball. It burst into bright flame.

“Shoot, Sivad! Shoot!” he commanded. “Shoot high, shoot far. Plant your arrow there in the dry undergrowth where the wind whips the jungle! Shoot and fail not!”

The stout bowman drew his arrow to the head, back, back till the flame licked his left hand.

Zing-g-g-g-g!

The humming bowspring sang in harmony with the zooning arrow. A swift blue streak split the air, high above the river. In a quick trajectory it leaped.