Northern News.
Mobile, August 28
--A special dispatch to the Advertiser, from Senatobia on the 27th, says the Chicago Times and Memphis papers of the 25th have been received.
The Washington correspondent of the first-named paper says the siege of Petersburg is raised.
Grant has sacrificed 30,000 men.
A Baltimore dispatch says Early's force is estimated at 55,000 men.
Adam Johnson is advancing in Tennessee with 1,200 men.
A part of Murrier's troops were badly cut up below Fort Donelson.
Arms are being clandestinely carried into Indiana for disloyalists.
On the 23d, considerable excitement prevailed in Memphis on account of a report that Forrest, Dick Taylor and Loring were about to attack the city.--The populace were wild, and ran under the bluff.--The military took to the boats.
Another report, that Taylor was planting batteries on the Arkansas shore, increased the confusion and the military burned out. The excitement prevailed for several hours.
Many persons were arrested for carrying news to Forrest. 