From North Alabama.
Demopolis, May 5.
--A special to the Meridian Clarion, from Langipahoa, the 4th, says that advices from Olive Branch are just received, stating that after eight hours of desperate fighting our forces repulsed and drove the enemy across Thompson's Creek.
The enemy numbered 1,500, our force only 800.
Reinforcements are rapidly being sent forward to Col. Powers.
Another dispatch from the same, dated 3d, via Summit, 4th, says that Col. John S. Scott, commanding a cavalry force of 600 men, engaged 5,000 Yankees from Baton Rouge and Port Hudson, under Gen. Andrews, and after several hours' fighting, in which Col. Powers, Maj. Ogden, and Lieut Power behaved with distinguished gallantry, he repulsed them with heavy loss, including Col. Zeabordeman, of the 4th Wisconsin cavalry, killed, and a large number of wounded.
Our loss five wounded. The fight took place near Olive Branch Creek.
The enemy are in full retreat towards Baton Rouge, and Maj. Fred. Ogden, commanding Wingfield's cavalry, pursuing. 