My gaze dropped to the foot of the cliffs. Stretched along their
length was a wide ribbon of beauty--a shimmering multitude of
gleaming, pulsing, prismatic moons; glowing, glowing ever brighter,
ever more wondrous--the gigantic Medusae globes feasting on dwarf and
frog-man alike!

Across the waters, faintly, came a triumphant shouting from Lugur's
and Yolara's men!

Was the ruddy light of the place lessening, growing paler, changing to
a faint rose? There was an exclamation from Larry; something like hope
relaxed the drawn muscles of his face. He pointed to the aureate dome
wherein sat the Three--and then I saw!

Out of it, through the long transverse slit through which the Silent
Ones kept their watch on cavern, bridge, and abyss, a torrent of the
opalescent light was pouring. It cascaded like a waterfall, and as it
flowed it spread whirling out, in columns and eddies, clouds and wisps
of misty, curdled coruscations. It hung like a veil over all the
islands, filtering everywhere, driving back the crimson light as
though possessed of impenetrable substance--and still it cast not the
faintest shadowing upon our vision.

"Good God!" breathed Larry. "Look!"

The radiance was marching--_marching_--down the colossal bridge. It
moved swiftly, in some unthinkable way _intelligently_. It swathed the
_Akka_, and closer, ever closer it swept toward the approach upon
which Yolara's men had now gained foothold.