Movements of the enemy in the West.
Atlanta, Sept. 11.
--Rosecrans is moving about from place to place, but making no decided forward movement.
Skirmishers are thrown out by the enemy at various places from Ringgold to Alpine.
From fifteen to twenty thousand of the enemy are said to be forty miles from Rome, Georgia, their prisoners say, waiting for their wagon train.--A general engagement is not expected soon unless Gen. Bragg attacks.
[second Dispatch.]
Atlanta, Sept. 12.
--On Friday, the 21st of August, a portion of Rosecrans's cavalry fired across the Tennessee river into Chattanooga.
For a few days feints were made at Harrison, 20 miles above Chattanooga, and below, at Bridgeport.
By the 26th the enemy had crossed at Bridgeport, the small force then at that point falling back, and Chattanooga having been evacuated by the citizens.
The enemy's movements were slow and cautious; and at length they passed down Will's Valley, through Dade county, Ga., in considerable force to flank Bragg's army on the left, by way of Rome, and the cavalry reached Alpine, in Chattanooga county, Ga., on the Alabama line, twenty-eight miles northwest of Rome.
On the 9th of September they had a skirmish with Col. Avery, commanding the 3d and 4th Georgia cavalry, who fell back after a hard fight.
The movement was anticipated.
In the meantime, most of Burnside's forces are understood to have joined Rosecrans, and pressed in considerable force on towards Bragg through the gaps of the mountains in Walker and Chattanooga counties, Ga. Small parties of the enemy's cavalry have visited Tunnell Hill, Catoosa, and Dalton, on the State road.
It is reported that Gen. Forrest was wounded in a skirmish near Dalton yesterday.
It is believed the main body of Rosecrans's army has fallen back to Chattanooga.--He has refused, and it is believed will still refuse, to give Bragg battle, but will aim at wintering in Chattanooga. 