But Sir Eustace looked over her head as though she were not there. His gaze sought and found his sister; and a frown gathered on his clear-cut, handsome face.
"Not in bed yet?" he said, and closing the door moved forward, passing Biddy by.
Isabel stood and faced him, but she drew back a step as he reached her, and a hunted look crept into her wide eyes.
"You are late," she said. "I thought you had forgotten to say good night."
He was still in evening dress. It was evident that he had only just come upstairs. "No, I didn't forget," he said. "And it seems I am not too late for you. I shouldn't have disturbed you if you had been asleep."
She smiled a quivering, piteous smile. "You knew I should not be asleep," she said.
He glanced towards the bed which Biddy was setting in order with tender solicitude. "I expected to find you in bed nevertheless," he said. "What made you get up again?"
She shook her head in silence, standing before him like a child that expects a merited rebuke.
He put a hand on her shoulder that was authoritative rather than kind. "Lie down again!" he said. "It is time you settled for the night."
She threw him a quick, half-furtive look. "No--no!" she said hurriedly. "I can't sleep. I don't want to sleep. I think I will get a book and read."
His hand pressed upon her. "Isabel!" he said quietly. "When I say a thing I mean it."
She made a quivering gesture of appeal. "I can't go to bed, Eustace. It is like lying on thorns. Somehow I can't close my eyes to-night. They feel red-hot."
His hold did not relax. "My dear," he said, "you talk like a hysterical child! Lie down at once, and don't be ridiculous!"
She wavered perceptibly before his insistence. "If I do, Scott must give me a draught. I can't do without it--indeed--indeed!"
"You are going to do without it to-night," Eustace said, with cool decision. "Scott is worn out and has gone to bed. I made him promise to stay there unless he was rung for. And he will not be rung for to-night."
Isabel made a sharp movement of dismay. "But--but--I always have the draught sooner or later. I must have it. Eustace, I must! I can't do without it! I never have done without it!"