Enormous, the birds had bat wings, and carried with them, as they approached, the stink of putrid flesh. The long beaks were overfull of sharp teeth. The heads, set upon bodies of glistening white-grey, were black. Reddish grey eyes searched the jungle as the creatures flapped along. But, the Pterodactyls—if they were that—passed above Naida’s band without offering attack, and presently Naida 385 gave the command to advance again.
In time, they came to a chasmlike gorge across which was suspended a slender long thread of a bridge. Not far above the bridge, a considerable river emptied itself into the gorge in a mirrorlike ribbon. Kirby could not hear the torrent fall—or rather could not hear it strike any solid bottom. But from somewhere in the unlighted, unfathomed depths of the abyss rose strange bubbling and whistling sounds.
At the bridge, Naida paused and pointed to the land across the river. And as Kirby looked in the direction indicated, he beheld a rocky eminence rising for several hundred feet straight up from the expanse of a level, tree and grass covered plain. Atop of the plateau, glimmered the complex towers and turrets, the crenellated walls of a castle which, in its grey antiquity, seemed as old as the race of men.
“It is behind those walls that the caciques dwell,” Naida said quickly. “It is behind the castle, in a series of separate houses, that the older members of the race dwell. We shall go and look upon them presently. But first we will force an interview with the caciques.”
In silence Kirby took her hand, and, with the others following, they moved out upon the swaying, perilous causeway which hung above the chasm. After that, the trip across the plain to the foot of the plateau cliffs was quickly accomplished.
Here, however, Kirby thought they must face trouble, for he found that the great walls, of a sparkling, almost glassy smoothness, shot up to a height of at least three hundred feet, and that no path of any sort was visible.
“We’re here,” he said, “but how can we get up?”
But understanding began to dawn as Naida laughed, and produced from the pouch at the side of her gauzy dress four pliable discs of a substance which resembled rubber.