OFFICE COMMISSARY-GENERAL OF PRISONERS,

Washington, D. C., July 30, 1864.

Major General E. A. HITCHCOCK,

Commissioner for Exchange, Washington, D. C.:

GENERAL: In reply to your note of this date, requesting information in relation to the confinement of certain prisoners at Johnson's Island, I have the honor to inform you that two only of the four received are in close confinement, viz: George P. Simms, no county or State given, captured at Ruggles' Mills, Ky., April 19, 1863, a 'spy ", sentenced to be hung May 29, 1863, has applied to take the oath of allegiance, and William S. Burgess, no county or State given, captured at Ruggles' Mills, Ky., April 20, 1863, a 'spy", sentenced to be hung May 29, 1863.

The other two, viz: John Marr, alias Perkins alias Hawkins, captured at Paris, Ky., April 5, 1863, a 'spy", sentenced to be hung May 29, 1863, and Thomas M. Campbell, no country or State given, captured at Ruggles' Mills, Ky., April 11, 1863, and still at Johnson's Island, but not in close confinement.

There are two other prisoners in close confinement, viz: H. P. Esteph, private, Fourteenth Kentucky, Company H, no place or date of capture given, a 'spy", sentenced to be hung, and Private John C. Shore, One hundred and ninth Illinois Infantry, Company F, a deserter, under sentence to be shot.

I am, general, very respectfully, your obedient servant,

W. HOFFMAN,

Colonel Third Infantry and Commissary-General of Prisoners.

OFFICE COMMISSARY-GENERAL OF PRISONERS,

Washington, D. C., July 30, 1864.

Brigadier General A. SCHEOPF, Commanding Fort Delaware, Del.:

GENERAL: The medical officers and chaplains of the rebel army at Camp Chase and Johnson's Island have been ordered to Fort Delaware. When they arrive will you forward them with others of the same class of officers to Fort Monroe, to be delivered to Major-General Butler, commissioner for the exchange of prisoners, for discharge beyond our lines? Place them in charge of a suitable guard, and report their delivery. The steamer New York is now in Philadelphia, being repaired, and she is expected to be at Fort Delaware to receive the prisoners above referred to by Wednesday next.

I am, general, very respectfully, your obedient servant,

W. HOFFMAN,

Colonel Third Infantry and Commissary-General of Prisoners.

MILITARY PRISON HOSPITAL,

Camp Morton, Ind., July 30, 1864.

Surg. CHARLES S. TRIPLER, U. S. Army,

Medical Director Northern Department:

SIR: In compliance with your instructions of July 27, 1864, I have the honor to submit the following report of the causes of the usually large mortality at this hospital during the week ending July 23, 1864: Death was caused by typho-malarial fever in four cases; by congestive