Mr. Froude says of Carlyle's wife that "her hardest work was a delight to her when she could spare her husband's mind an anxiety or his stomach an indigestion. While he was absorbed in his work and extremely irritable as to every ailment or discomfort, her life was devoted to shield him in every possible way." In the inscription upon her tombstone Carlyle bore testimony that he owed to his wife a debt immense of gratitude. "In her bright existence she had more sorrows than are common, but also a soft invincibility, a capacity of discernment, and a noble loyalty of heart which are rare. For forty years she was the true and loving helpmate of her husband, and by act and word unweariedly forwarded him as none else could in all of worthy that he did or attempted. She died at London, April 21st, 1866, suddenly snatched away from him, and the light of his life as if gone out." What an influence women have exercised upon teachers of religion and philosophy! When no one else would encourage Mahomet, his wife Kadijah listened to him with wonder, with doubt. At length she answered: "Yes, it was true this that he said." We can fancy, as does Carlyle, the boundless gratitude of Mahomet, and how, of all the kindnesses she had done him, this of believing the earnest struggling word he now spoke was the greatest. "It is certain," says Novalis, "my conviction gains infinitely the moment another soul will believe in it." It is a boundless favour. He never forgot this good Kadijah. Long afterwards, Ayesha, his young favourite wife, a woman who indeed distinguished herself among the Moslem by all manner of qualities, through her whole long life, this young brilliant Ayesha was one day questioning him: "Now am I not better than Kadijah? she was a widow; old, and had lost her looks: you love me better than you did her?" "No, by Allah!" answered Mahomet: "No, by Allah! She believed in me when none else would believe. In the whole world I had but one friend, and she was that!" It will suffice to hint at the scientific value of the little that has been disclosed respecting Madame Clothilde de Vaux in elucidating the position of Auguste Comte as a teacher. Some may think that John Stuart Mill first taught his wife and then admired his own wisdom in her. His own account of the matter is very different, as we learn from the dedication of his essay "On Liberty":