Aside from newspapers, and from collections of public documents of private correspondence, which cannot be enumerated here, the source materials for the period fall into two main classes: books of autobiography and reminiscence, and the writings of travelers. Most conspicuous in the first group is Thomas H. Benton, Thirty Years' View; or, a History of the Working of the American Government for Thirty Years, from 1820 to 1850, 2 vols. (1854). Benton was an active member of the Senate throughout the Jacksonian period, and his book gives an interesting and valuable first-hand account of the public affairs of the time. Amos Kendall's Autobiography (1872) is, unfortunately, hardly more than a collection of papers and scattered memoranda. Nathan Sargent's Public Men and Events, 1817-1853, 2 vols. (1875), consists of chatty sketches, with an anti-Jackson slant. Other books of contemporary reminiscence are Lyman Beecher's Autobiography, 2 vols. (1863-65); Robert Mayo's Political Sketches of Eight Years in Washington (1839); and S.C. Goodrich's Recollections of a Lifetime, 2 vols. (1856). The one monumental diary is John Quincy Adams, Memoirs; Comprising Portions of his Diary from 1795 to 1848 (ed. by Charles F. Adams, 12 vols., 1874-77). All things considered, there is no more important nonofficial source for the period. In Jackson's day the United States was visited by an extraordinary number of Europeans who forthwith wrote books descriptive of what they had seen. Two of the most interesting--although the least flattering--of these works are Charles Dickens's American Notes for General Circulation (1842, and many reprints) and Mrs. Frances E. Trollope's Domestic Manners of the Americans (1832). Two very readable and generally sympathetic English accounts are Frances A. Kemble's Journal, 1832-1833, 2 vols. (1835) and Harriet Martineau's Society in America, 3 vols. (2d ed., 1837). The principal French work of the sort is M. Chevalier, Society, Manners, and Politics in the United States (Eng. trans. from 3d French ed., 1839). Political conditions in the country are described in Alexis de Tocqueville, Democracy in America (Eng. trans. by Reeve in 2 vols., 1862), and the economic situation is set forth in detail in James S. Buckingham, America, Historical, Statistical and Descriptive, 2 vols. (1841), and The Slave States of America, 2 vols. (1842).