In person he was not unlike his sister. The same eyes, the same contour, the same intellectual forehead. His lips, however, were firmer, and his long, thin, lower jaw was sharper and more decided. He ran his finger and thumb down it from time to time, as he glanced over his letters. "Those maids are very noisy," he remarked, as a clack of tongues sounded in the distance. "It is Sarah," said his sister; "I shall speak about it." She had handed over his coffee-cup, and was sipping at her own, glancing furtively through her narrowed lids at the austere face of her brother. "The first great advance of the human race," said the Professor, "was when, by the development of their left frontal convolutions, they attained the power of speech. Their second advance was when they learned to control that power. Woman has not yet attained the second stage." He half closed his eyes as he spoke, and thrust his chin forward, but as he ceased he had a trick of suddenly opening both eyes very wide and staring sternly at his interlocutor. "I am not garrulous, John," said his sister. "No, Ada; in many respects you approach the superior or male type." The Professor bowed over his egg with the manner of one who utters a courtly compliment; but the lady pouted, and gave an impatient little shrug of her shoulders. "You were late this morning, John," she remarked, after a pause. "Yes, Ada; I slept badly. Some little cerebral congestion, no doubt due to over-stimulation of the centers of thought. I have been a little disturbed in my mind." His sister stared across at him in astonishment. The Professor's mental processes had hitherto been as regular as his habits. Twelve years' continual intercourse had taught her that he lived in a serene and rarefied atmosphere of scientific calm, high above the petty emotions which affect humbler minds. "You are surprised, Ada," he remarked. "Well, I cannot wonder at it. I should have been surprised myself if I had been told that I was so sensitive to vascular influences. For, after all, all disturbances are vascular if you probe them deep enough. I am thinking of getting married." "Not Mrs. O'James" cried Ada Grey, laying down her egg-spoon. "My dear, you have the feminine quality of receptivity very remarkably developed. Mrs. O'James is the lady in question." "But you know so little of her. The Esdailes themselves know so little. She is really only an acquaintance, although she is staying at The Lindens. Would it not be wise to speak to Mrs. Esdaile first, John?"