My acknowledgments are due to Dr. Smiles's "Lives of theEngineers," "Life of the Stephensons," and "Life of a ScotchNaturalist;" to Lady Eastlake's "Life of Gibson;" to Mr. Holden's"Life of Sir William Herschel;" to M. Seusier's "J. F. Millet, SaVie et Ses 0euvres;" and to Mr. Thayer's "Life of PresidentGarfield;" from which most of the facts here narrated have beenderived.