IV. The Executive order dated July 5, 1865, approving the sentences in the cases of Samuel Arnold, Samuel A. Mudd, Edward Spangler, and Michael O'Laughlin, is hereby modified so as to direct that the said Arnold, Mudd, Spangler, and O'Laughlin be confined at hard labor in the military prison at Dry Tortugas, Florida, during the period designated in their respective sentences.
The Adjutant-General of the Army is directed to issue orders for the said prisoners to be transported to the Dry Tortugas, and to be confined there accordingly.
V. Major-General W. S. Hancock, United States Volunteers, commanding Middle Military Division, is commanded to send the prisoners Samuel Arnold, Samuel A. Mudd, Edward Spangler, and Michael O'Laughlin, under charge of a commissioned officer, with a sufficient guard, to the Dry Tortugas, Florida, where they will be delivered to the commanding officer of the post, who is hereby ordered to confine the said Arnold, Mudd, Spangler, and O'Laughlin at hard labor during the periods designated in their respective sentences.
VI. The military commission of which Major-General David Hunter is president is hereby dissolved.
By command of the President of the United States:
E. D. TOWNSEND,
Andrew Johnson, Executive Order Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/202940