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 xii to me. Of his living descendants, Mrs. James Parmelee, a granddaughter, of Washington, D. C., and Mrs. Matthew Fontaine Maury, Jr., a daughter-in-law, of Cincinnati, Ohio gave me much assistance. Mrs. Werth of Richmond, Virginia, and her two daughters, Mrs. N. Montgomery Osborne of Norfolk, Virginia, and Mrs. Littleton Fitzgerald of Richmond, very patiently answered my numerous questions and furnished me interesting and very desirable information. The list of all the other persons who have helped me, in one way or another, in the writing of this book would be too long to set down in a preface; but among the many I wish to single out by name the following: Mr. J. C. Fitzpatrick, Assistant Chief, Division of Manuscripts, Library of Congress; Captain Edwin T. Pollock, U. S. Navy, Superintendent, and Mr. William D. Horigan, Librarian, of the United States Naval Observatory; Captain Dudley W. Knox, U. S. Navy (Retired), Superintendent, and Miss Nannie Domin Barney, Archivist, of the Naval Records and Library of the Navy Department; Mr. Andrew Keogh, Librarian, Yale University Library; Mr. H. M. Lydenberg, Reference Librarian, New York Public Library; Mr. Charles F. D. Belden, Director of the Public Library of the City of Boston; Miss Helen C. Bates, Reference Librarian, Detroit Public Library; Dr. William G. Stanard, Corresponding Secretary and Librarian, Virginia Historial Society; Mr. Edward V. Valentine, Acting President of the Virginia Historical Society; Dr. H. R. Mcllwaine, Librarian of the Virginia State Library; R. H. Crockett, Esq., Miss Susie Gentry, and Mr. Park Marshall, Vice President of the Tennessee Historical Society,—all of Franklin, Tennessee; Mr. John