No dearth of Beauregard manuscripts hindered the preparation of this biography. The general wrote voluminously, and most of his papers seem to have been preserved. In fact, I have sometimes been discouraged to have friends inform me, at exultant moments when I thought I had completed my research, that they knew of a new batch of letters that had turned up.
The largest and most valuable collection of Beauregard Papers is in the Division of Manuscripts, Library of Congress. Spanning his mature life, it includes fifty-one volumes and contains his letterbooks, which have copies of letters that otherwise would be unavailable. There are many Beauregard items in the National Archives in the Records of the Adjutant General's Office relating to West Point; in the Office of Chief of Engineer files; in the Adjutant General files, Letters Received; in the War Department Records, Letters Received; and in the War Department Collection of Confederate Records. The Archives records were of particular assistance in following Beauregard's military career before 1860. Another large collection is the Beauregard Papers in the Department of Archives, Louisiana State University; most of these papers relate to his career after the war. There are smaller collections of Beauregard Papers at the following places: the Howard-Tilton Memorial Library, Tulane University; Duke University Library; Missouri Historical Society, St. Louis; Mirabeau B. Lamar Library, University of Texas; Confederate Collection, Emory University Library; Charleston Library Society, Charleston, South Carolina; Confederate Memorial Hall, New Orleans; the Cabildo, New Orleans; the North Carolina State Department of Archives and History, Raleigh; the Confederate Museum, Richmond; and the South Carolina Historical Society, Charleston.
Although not called the Beauregard Papers, a file of Beauregard letters is in the Yates Snowden Papers, South Caroliniana Library, University of South Carolina. Miss Laure Beauregard Larendon, of Atlanta, Georgia, granddaughter of the general, permitted me to examine her collection of family letters; later she presented some of