"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
