China Mail-Service hearings before the United States House Committee on Ways and Means, Forty-Third Congress, second session and Forty-Second Congress, third session, on Feb. 25, 26, 28, Mar. 1, 1873, Dec. 11, 12, 15-19, 21, 28-31, 1874, Jan. 2, 6-9, 11-15, 18, 19-23, 25, 27, 30, Feb. 3, 11, 13, 15, 18, 23, 1875