Brilliant Guerrilla Dashes.
Tupelo, July 30.
--Information received at Headquarters states that Col. Armstrong, commanding the cavalry of the army of the West, has taken Courtland, Ala., capturing one hundred and fifty more prisoners and six cars.
Our loss was two killed and eight wounded. The citizens of Courtland were frantic with joy. We have reliable information that 15,000 Federals during last week passed Tuscumbia eastward, destined for Chattanooga.
[Second Dispatch.]
Tupelo, July 30.
--Three Yankee captains and five lieutenants, captured at Courtland, arrived here to- night.
Gen. Armstrong's official report states that on the 25th he attacked the enemy at Courtland, on the Memphis and Charleston Railroad; took 133 prisoners, including eight commissioned officers.
The non-commissioned officers and men were paroled.
The enemy's loss was three killed and wounded. Ours was less.
He also captured twelve wagons with horses attached and equipments, a large number of arms, the camp and garrison equipage of four companies, and a quantity of supplies, including 500 bushels of corn in sacks.
The depot, telegraph line, bridge, and trestle work, were destroyed.
Gen. Armstrong defeated the enemy at Town Creek the same day, taking fourteen prisoners. --Rosecrans's division is at Tuscumbia.
Grenada, July 29.--Our guerrillas have re-occupied Brownsville, Tenn, and burned 3,000 bales of cotton purchased by Yankees.
Grenada. July 30.--Passengers from Memphis report that our guerrillas have burnt several Federal transports on the Tennessee river, near Eastport. 