Principally bound volumes of correspondence documenting Chandler's work as assistant secretary of the treasury (1865-1867), secretary of the navy (1882-1885), U.S. senator from New Hampshire (1887-1901), and chairman of the Spanish Treaty Claims Commission (1901-1908). Includes material reflecting Chandler's prominence in the Republican Party and his role in the presidential campaigns of 1868, 1872, and 1880 and in the disputed election of 1876 between Rutherford B. Hayes and Samuel J. Tilden. Correspondents include Chester Alan Arthur, James Gillespie Blaine, Montgomery Blair, George S. Boutwell, Jay Cooke, Walter Quintin Gresham, William Pitt Kellogg, Philander C. Knox, William McKinley, William Orton, Orville Hitchcock Platt, Thomas Collier Platt, and Lew Wallace.