From Trans-Mississippi.
Clinton, La., May 24. via Summit, May 26.
--Banks has escaped from Alexandria by way of Simmesport.
A. J. Smith's corps has gone up to Natchez and Vicksburg.
The balance of his army is in full retreat towards New Orleans, being now at Morganza, on the west bank of the river.
Major Gen. L. Cauby has arrived and assumed command.
Banks having gone to New Orleans.
It is reported, and believed to be reliable, that Lieut Gen Dick Taylor is crossing at Atchafalaya river, 12 miles below where Banks crossed.
Banks's troops are reported, on good authority, to be very much demoralized. Within the last six days the batteries belonging to Scott's command have fired into five Yankee transports, crippling three seriously, knocking out the steam-pipe of one and driving off, the gunboat that came to her relief. The loss of life is not known--Three stopped at Cat Island for repaired. The forces in the district are rapidly increasing, and Col Scott is ready for any advance the enemy may make.
