however, he can hold his own, march on Sharpsburg and co-operate with us, unless that place should be evacuated by the enemy. In that case, move at once to co-operate with Franklin. Porter, of course, will continue on his march to Sharpsburg.

Very respectfully, your obedient servant,

G. B. McC[LELLAN]

[19.]

HEADQUARTERS ARMY OF THE POTOMAC.

September 15, 1862-4.30 p. M.

Major-General BURNSIDE:

GENERAL: The commanding general directs you to move your command at once to Sharpsburg, via Porterstown, to assist in the attack upon the former place. The general will be there in person.

I am, general, very respectfully, your obedient servant,
GEO. D. RUGGLES,

Colonel and Aide-de-Camp.

[19.]

HEADQUARTERS ARMY OF THE POTOMAC.

Bolivar, September 15, 1862-10.45 a. M.

J. W. GARRETT, Esq.:

President of the Baltimore and Ohio Railroad, Baltimore:

Please take measures to have the railroad bridge over the Monocacy repaired with the least possible delay.

GEO. B. McCLELLAN,
Major-General, Commanding.

[19.]

HEADQUARTERS ARMY OF THE POTOMAC.

September 16, 1862.

GENERAL: Lieutenant Shunk has gone back to hurry up ordnance supplies of ammunition, &c. He informed me he had no supply of musket ammunition, but that there was plenty throughoutl the various division trains, and a supply might be taken for Morell's division from the trains wherever it could be found. He thought that Mansfield's corps was better supplied than any other.

Very respectfully,
S. WILLIAMS,

Assistant Adjutant-General.

[19.]

HEADQUARTERS ARMY OF THE POTOMAC.

September 16, 1862-9.30 a. M.

Major-General SUMNER:

GENERAL: General McClellan desires you to inform him the moment the head of Mansfield's corps comes up. The general will be for the present at General Hooker's headquarters.

I am, general, very respectfully, your obedient servant,
GEO. D. RUGGLES.

Colonel and Aide-de-Camp.

[19.]