"A nun of one of the great Contemplative Orders," Sister Aquinas explained, turning politely to Sarella. "It is a much rarer vocation than that of active nuns, like ourselves. Carmelites do not teach school, or have orphanages, or homes for broken old men or women, nor nurse the sick, either in their homes or in hospital."

"Sounds pretty useless," Sarella remarked carelessly; "what do they do anyway?"

"They are not at all useless," the nun answered, smiling good-humoredly. "Married women are not useless, though they do not do any of those things either."

"Of course not. But they are married. They make their husbands comfortable—"

The nun could not help taking her own turn of interrupting, and said with a little laugh:

"Not quite always, perhaps."

"The good ones do."

"Perhaps not invariably. Some even pious women are not remarkable for making their husbands comfortable."

Sarella laughed, and the elderly nun went on.

"Of course, it is the vocation of married women to do as you say. And I hope most do it, that and setting the example of happy Christian homes. I do not really mean to judge of the vocation by those who fail to fulfill it. It is God's vocation for the vast majority of His daughters. But not for all."