"Vrolok did not know it," answered Kirowan. "He thought that Gordon was dead, and I convinced him that he himself had been trapped, and was doomed. In his demoralization he fell easy prey to the thing he called forth. It, of course, was always watching for a moment of weakness on his part. The powers of Darkness never deal fairly with human beings; he who traffics with them is always cheated in the end."