Little did they dream that the truth could never issue from her lips—that the vow she had made was to a man to whom the exposure meant loss of his liberty.

Her own position was a ghastly one. She had already realised that. She shuddered at the recollection of those hideous insults of that fat, brutal tormentor—and of the fate which he had marked out for her because she would not satisfy him concerning either her father or her lover.

Her sole thought was of “Charlie”—Mr Mullet, or “Red Mullet” as his friends were in the habit of calling him. She smiled at the humour of the appellation. It fitted him so well on account of his red hair and bristly red moustache.

Half an hour later the subject of her absence having by mutual consent, been dropped, the Professor went to his study to write some letters, while Gwen and her lover strolled into the big drawing-room, gaunt and cheerless without a fire.

When they were alone he took her white, trembling hand, and, looking steadily into her eyes, begged her to afford him the satisfaction of knowing the truth about her absence.

She had been dreading that moment, and she only shook her head.

“But, dearest!” he urged, “surely I have a right to know!”

“I thought you said only the day before your departure for Copenhagen that you could always trust me, Frank,” she answered, in a voice full of quiet reproach.

“I said so, I admit. But almost immediately I had gone it seems that you slipped out of the house without a word, and have only just returned. You will make no explanation, therefore what am I to think? What can I think!”

“You must think as evil of me as you may, Frank,” was the girl’s calm reply.