Page:The Return of Tarzan.djvu/272

 For an hour the little expedition rested upon the mountaintop, and then Tarzan led them down into the valley below. There was no trail, but the way was less arduous than the ascent of the opposite face of the mountain had been. Once in the valley their progress was rapid, so that it was still light when they halted before the towering walls of the ancient city.

The outer wall was fifty feet in height where it had not fallen into ruin, but nowhere as far as they could see had more than ten or twenty feet of the upper courses fallen away. It was still a formidable defense. On several occasions Tarzan had thought that he discerned things moving behind the ruined portions of the wall near to them, as though creatures were watching them from behind the bulwarks of the ancient pile. And often he felt the sensation of unseen eyes upon him, but not once could he be sure that it was more than imagination.

That night they camped outside the city. Once, at midnight, they were awakened by a shrill scream from beyond the great wall. It was very high at first, descending gradually until it ended in a series of dismal moans. It had a strange effect upon the blacks, almost paralyzing them with terror while it lasted, and it was an hour before the camp settled down to sleep once more. In the morning the effects of it were still visible in the fearful, sidelong glances that the Waziri continually cast at the massive and forbidding structure which loomed above them.