Page:Sir William Herschel, his life and works (1881).djvu/24

2 prepared, about the year 1818, a biographical memorandum, which his sister Author:Caroline Lucretia Herschel placed among his papers.

This has never been made public. The only thoroughly authentic sources of information in possession of the world, are a letter written by himself, in answer to a pressing request for a sketch of his life, and the Memoir and Correspondence of  (London, 1876), a precious memorial not only of his life, but of one which otherwise would have remained almost unknown, and one, too, which the world could ill afford to lose. The latter, which has been ably edited by Mrs., is the only source of knowledge in regard to the early years of the great astronomer, and together with the all too scanty materials to be gained from a diligent search through the biography of the time, affords the data for those personal details of his life, habits, and character, which seem to complete the distinct, though partial conception