In accordance with the provisions of Section 179 of the Revised Statutes, as amended by an act making appropriations for the legislative, executive and judicial expenses of the government, approved August 5, 1882 (22 Stat., 238) Lieutenant-General Nelson A. Miles, commanding the Army of the United States is authorized and directed to perform the duties of Secretary of War during the illness or temporary absence from the seat of government of the Secretary of War whenever during such illness or absence the Assistant Secretary of War is also absent; in accordance with the same provisions, Major-General Henry C. Corbin, Assistant Adjutant-General of the Army is authorized and directed to perform the duties of Secretary of War whenever during such illness or absence the Assistant Secretary of War and the lieutenant-general commanding the Army are also absent.
WILLIAM MCKINLEY
William McKinley, Executive Order Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/205528