WHEN first I was asked to put together a memoir of my aunt, I saw reasons for declining the attempt. It was not only that, having passed the three score years and ten usually allotted to man's strength, and being unaccustomed to write for publication, I might well distrust my ability to complete the work, but that I also knew the extreme scantiness of the materials out of which it must be constructed. The grave closed over my aunt fifty-two years ago; and during that long period no idea of writing her life had been entertained by any of her family. Her nearest relatives, far from making provision for such a purpose, had actually destroyed many of the letters and papers by which it might have been facilitated. They were influenced, I believe, partly by an extreme dislike to publishing private details, and partly by never having assumed that the world would take so strong and abiding an interest in her works as to claim her name as public property. It was therefore necessary for me to draw upon recollections rather than on written documents for my materials; while the subject itself supplied me with nothing striking or prominent with which to arrest the attention of the reader. It has been said that the happiest individuals, like nations during their happiest periods, have no history. In the case of my aunt, it was not only that her course of life was unvaried, but that her own disposition was remarkably calm and even.