Afterwards Helen looked back upon those few moments as the most uncomfortable of her life. She was caught in the very act of a most unwarrantable and even immodest intrusion, which in the eyes of these two men could only appear like the attempted gratification of a reprehensible and vulgar curiosity. She made one spasmodic attempt to kindle her suspicions into a definite accusation, to stand upon her dignity, and demand an explanation of what she had seen. But she failed utterly. Directly she tried to clothe the shreds of this idea of hers with words, and to express them, she seemed to vividly realize the almost ludicrous improbability of the whole thing. One glance into the pale, dignified face which was bent upon her full of unconcerned surprise--and hateful to her with a gentle shade of pity at her confusion already creeping into it--and her attempt collapsed. She felt her cheeks burn with shame, and her eyes drooped before his steady gaze. She began to long feverishly for something to dissolve the situation. The silence was dreadful to her, but she could think of nothing to say. It was Mr. Brown, at last, who spoke. "I was afraid you would not be able to find your way, Miss Thurwell," he said quietly. "I must apologize for asking you to come into such a den. The small engraving on the wall is the proof 'Bartolozzi' I spoke to you about. The head is perfect, is it not? Some day I should like to show you my 'Guido.' I am afraid, just now, I could not expect you to appreciate them." She murmured something--what, she scarcely knew, and he did not appear to hear. The cold surprise disappeared from Sir Allan's face. Evidently he believed in Mr. Brown's mercifully offered explanation of her presence here. "What! are you an enthusiast, Miss Thurwell?" he exclaimed. "Well, well, I was worse myself once in my younger days, before my profession made a slave of me. Surely, that is a genuine 'Velasquez,' Mr. Brown. Upon my word! Fancy coming across such a treasure here!" He picked his way across the disorderly chamber, and, adjusting his eyeglass, stood looking at the picture. Helen made a hasty movement towards the door, and Mr. Brown followed her into the adjoining room. "If I had known that I was to be honored by a visit from a lady," he said, "I would have endeavored----" She turned suddenly round upon him with flaming cheeks. "Don't," she interrupted, almost beseechingly. "Mr. Brown, you were very good to me just then. Thank you! I was most abominably rude to go into that room without your permission." Her eyes were fixed upon the floor, and her distress was evident. It was clear that she felt her position acutely. "Pray say no more about it," he begged earnestly. "It isn't worth a second thought."