She was preparing herself for a nervous break-down, and she knew it. First came a fluttering of the eyeballs, so that she was compelled to close her eyes for relief. A little later the eyelids were afflicted by a nervous twitching that she could not control. To add to the strain, she could not forget the tragedy. She remained as close to the horror as on the first morning when the unexpected stalked into the cabin and took possession. In her daily ministrations upon the prisoner she was forced to grit her teeth and steel herself, body and spirit. Hans was affected differently. He became obsessed by the idea that it was his duty to kill Dennin; and whenever he waited upon the bound man or watched by him, Edith was troubled by the fear that Hans would add another red entry to the cabin's record. Always he cursed Dennin savagely and handled him roughly. Hans tried to conceal his homicidal mania, and he would say to his wife: "By and by you will want me to kill him, and then I will not kill him. It would make me sick." But more than once, stealing into the room, when it was her watch off, she would catch the two men glaring ferociously at each other, wild animals the pair of them, in Hans's face the lust to kill, in Dennin's the fierceness and savagery of the cornered rat. "Hans!" she would cry, "wake up!" and he would come to a recollection of himself, startled and shamefaced and unrepentant. So Hans became another factor in the problem the unexpected had given Edith Nelson to solve. At first it had been merely a question of right conduct in dealing with Dennin, and right conduct, as she conceived it, lay in keeping him a prisoner until he could be turned over for trial before a proper tribunal. But now entered Hans, and she saw that his sanity and his salvation were involved. Nor was she long in discovering that her own strength and endurance had become part of the problem. She was breaking down under the strain. Her left arm had developed involuntary jerkings and twitchings. She spilled her food from her spoon, and could place no reliance in her afflicted arm. She judged it to be a form of St. Vitus's dance, and she feared the extent to which its ravages might go. What if she broke down? And the vision she had of the possible future, when the cabin might contain only Dennin and Hans, was an added horror.