WASHINGTON, July 7, 1864 - 12. 40 p. m.

Lieutenant-General GRANT:

General Orders, 214, of June 21, adds that portion between the Patuxent, the Chesapeake, and Potomac, including Point Lookout, to Department of Washington. Previous to your special order of July 5, Secretary of War had assigned General Barnes to command at Point Lookout. He has now ordered General Hinks to report for temporary duty here. Please acknowledge receipt.

E. D. TOWNSEND,

Assistant Adjutant-General.

GRANT'S HEADQUARTERS, July 7, 1864.

(Received 9. 30 a. m.)

Honorable E. M. STANTON,

Secretary of War:

The First Maryland Cavalry os part of Bradley Johnson's command - a sort of independent organization that last winter guarded Lee's rear, and were stationed at Hanover Junction. The last that was heard of this command, it was called the Maryland Line. It left Cold Harbor with Breckinridge's division to meet Hunter's invasion about the 7th or 8th of June.

GEO. G. MEADE,

Major-General, Commanding.

HEADQUARTERS OF THE ARMY,
Washington, D. C., July 7, 1864.

General MEIGS,

Quartermaster-General:

Some 3,000 cavalry have been directed to rendezvous at mouth of the Monocacy. They will be sent forward as fast as they arrive from Army of the Potomac. You will arrange to supply them with forage.

H. W. HALLECK,

Major-General and Chief of Staff.

HEADQUARTERS OF THE ARMY,
Washington, D. C., July 7, 1864.

Colonel Ekin,

Cavalry Bureau:

All dismounted cavalry from Army of the Potomac are ordered to cavalry camp. Mount them as far as you can provide horses, and send quartermasters to General Wallace, with funds to pay for horses to be impressed and sent to the mouth of the Monocacy for remounts; also forges, &c., for shoeing some 3,000 or 4,000. Only loyal owners are to be paid, and not to exceed contract prices.

H. W. HALLECK,

Major-General and Chief of Staff.