THIRTEENTH Army Corps at the battle of Big Black Bridge, May 17, 1863.

Orders have already been issued to collect stragglers, negroes, and mules, and it is being done in this army corps.

Your obedient servant,

WALTER B. SCATES,

Lieutenant-Colonel and Assistant Adjutant-General.

[Inclosure.]

HEADQUARTERS THIRTEENTH ARMY CORPS,
Big Black River Bridge, MISS, May 17, 1863.

COLONEL: I have the honor to submit the following invoice of ordnance and ordnance stores captured by the Thirteenth Army Corps in the engaged this morning. Guns. -Six 12-pounder bronze howitzer; three 12-pounder bronze guns (Napoleons), one disabled; three 6-pounder bronze guns; six 10-pounder Parrott rifled guns (iron); aggregate, eighteen guns, with limbers and caissons complete, except two, the caissons of which had been previously captured. The following ordnance stores were found on the carriages of the above-mentioned pieces: There hundred and twenty-four rounds of 12-pounder howitzer canister; 578 rounds of 12-pounder howitzer shells (fuse); 11 rounds of 6-pounder howitzer canister; 175 rounds of 6-pounder howitzer shells; 8 rounds of 12-pounder solid shot; 112 rounds of 10 pounder Parrott fuse-shells; 120 rounds of 10-pounder (the Famous) canister; 97 rounds of 10-pounder (Reed projectile) solid shot; 35 port-fires, and 10 6-pounder cartridges, three fourths-pound charge. In addition to the above, the following ammunition was captured in some cars at Edwards Station: Eighty-eight thousand rounds of riffle musket ammunition, calibers. 54,. 58, and . 69; 30 rounds of 6-pounder shell and canister; 10-rounds of 6-pounder spherical case; 110 rounds of 12-pounder howitzer canister (fired); 100 rounds of 3 inch Reed shot; 116 stand of small-arms of various patterns, and 2 boxes of blank cartridges for 3-inch guns. The small-arms captured in the battle of to day will amount to several thousand, but as they have not yet been collected, no definite report can as yet be made.

Respectfully, your obedient servant,

THOMAS S. MATHER,

Colonel and Chief of Ordnance, THIRTEENTH Army Corps.

Colonel Walter B. SCATES,

Assistant Adjutant -General.

Number 3. Report of Brigadier General Albert L. Lee, u. S. Army, commanding NINTH DIVISION, THIRTEENTH Army Corps. HDQRS. FIRST Brigadier, NINTH DIV., THIRTEENTH A. C.,

MAY 22, 1863. CAPTAIN: I have respectfully to report that on the morning of the 17th instant I was, by order of Major-General McClernand, command