He never turned in his mad chase, but pushed rapidly on, while I panted after him like a figure in some unreasoning nightmare. And, as I ran, it came upon me that he had been aware all the time, in his quiet, internal way, of many things that he had kept for his own secret consideration; he had been watching, waiting, planning from the very moment we entered the shade of the wood. By some inner, concentrated process of mind, dynamic if not actually magical, he had been in direct contact with the source of the whole adventure, the very essence of the real mystery. And now the forces were moving to a climax. Something was about to happen, something important, something possibly dreadful. Every nerve, every sense, every significant gesture of the plunging figure before me proclaimed the fact just as surely as the skies, the winds, and the face of the earth tell the birds the time to migrate and warn the animals that danger lurks and they must move.