So great was the force of the impact when the thing struck Bradley between the shoulders that the man was half stunned. His rifle flew from his grasp; he felt clawlike talons of great strength seize him beneath his arms and sweep him off his feet; and then the thing rose swiftly with him, so swiftly that his cap was blown from his head by the rush of air as he was borne rapidly upward into the inky sky and the cry of warning to his companions was forced back into his lungs. The creature wheeled immediately toward the east and was at once joined by its fellow, who circled them once and then fell in behind them. Bradley now realized the strategy that the pair had used to capture him and at once concluded that he was in the power of reasoning beings closely related to the human race if not actually of it. Past experience suggested that the great wings were a part of some ingenious mechanical device, for the limitations of the human mind, which is always loath to accept aught beyond its own little experience, would not permit him to entertain the idea that the creatures might be naturally winged and at the same time of human origin. From his position Bradley could not see the wings of his captor, nor in the darkness had he been able to examine those of the second creature closely when it circled before him. He listened for the puff of a motor or some other telltale sound that would prove the correctness of his theory. However, he was rewarded with nothing more than the constant flap-flap. Presently, far below and ahead, he saw the waters of the inland sea, and a moment later he was borne over them. Then his captor did that which proved beyond doubt to Bradley that he was in the hands of human beings who had devised an almost perfect scheme of duplicating, mechanically, the wings of a bird--the thing spoke to its companion and in a language that Bradley partially understood, since he recognized words that he had learned from the savage races of Caspak. From this he judged that they were human, and being human, he knew that they could have no natural wings--for who had ever seen a human being so adorned! Therefore their wings must be mechanical. Thus Bradley reasoned--thus most of us reason; not by what might be possible; but by what has fallen within the range of our experience. What he heard them say was to the effect that having covered half the distance the burden would now be transferred from one to the other. Bradley wondered how the exchange was to be accomplished. He knew that those giant wings would not permit the creatures to approach one another closely enough to effect the transfer in this manner; but he was soon to discover that they had other means of doing it.