From the army of Tennessee.
Missionary Ridge, Oct. 22.
--Four brigades of the enemy moved down the river this morning to their picket lines, as if for the purpose of making an attack on our forces at the base of Lookout.
After manœuvring around for an hour, two brigades withdrew, the others remaining under cover of the banks of Chattanooga creek.
In the meantime a battery on Moccasin Point opened fire on Hood's division, and fired slowly throughout the morning, without doing any damage.
The weather is clear and warm.
[second Dispatch.]
Missionary Ridge, Oct. 23.
--A heavy rain has been falling since 10 o'clock last night, shutting Chattanooga out of view.