From the North.
Concentration of Confederates on James river — a Confederate Dash on Gloucester — capture of a Confederate mail Carrier, &c.
Petersburg, Aug. 3.
--New York and Philadelphia dates of the 28th and 29th ult. have been received.
The Fortress Monroe correspondent of the Philadelphia Inquirer says he is credibly informed that large rebel forces are concentrating on the line of James river, above the junction of the Appomattox and the James, supposed to number between fifty and seventy thousand, and ‘"Stonewall"’ Jackson in command.
On the night of the 24th ult, a company of rebel cavalry dashed down on Gloucester Point, opposite Yorktown, and carried off a large lot of ‘"contrabands,"’ forced into the rebel army all the male inhabitants, and then set fire to a lot of ship timber, and taking with them the trophies departed. Similar depredations were committed in the vicinity of Williamsburg on the night of the 25th. The rebels made incursions into the lines of McClellan's army, and carried off a large number of army beeves.
Two thousand ‘"contrabands,"’ on their way to McClellan, passed Old Point on the 26th.
Jeff. Davis's mail carrier running to Norfolk was caught on Friday, with 2,000 letters.
Fifteen or twenty rebels captured near Suffolk have reached Fort Monroe.
Gen. Pope took the field last Monday. There have been numerous desertions from his army. Between 40 and 50 of the 105th New York deserted within the past week.
On the 23d ult, four guerrillas fired upon and wounded two Federal near Warrenton. Capt. Williams, of the Michigan cavalry, went out and brought in eight unoffending Virginians, to be held responsible.
Within three days past Gen. Hatch has crossed Swift Run Gap to McGaheysville. The people of Culpeper, Orange and Madison were thunderstruck at the recent sudden appearance of the Onion forces under Hatch.
A dispatch, dated Cairo, 26th ult, says the steamer from the Tennessee river brings the news of a rebel raid at Florence, Ala, on Tuesday. The rebels entered the city, burned the warehouses, filled with Yankee Commissary and Quartermaster stores, and also burnt all the cotton in the vicinity. They seized the Yankee steamer Colonna, used for conveying army supplies over the shoals, took all the money belonging to the boat and passengers, and then bural the boat. The property destroyed is reported to be immensely valuable. A small detachment of Mitchell's army was captured. The rebels then proceeded down the Tennessee to Chickasaw, Waterloo, and the vicinity of Eastport, and burnt all the warehouses containing cotton.
Another hand of forty rebels attacked a wagon train, near Pittsburg Landing, and captured sixty wagons filled with Government stores.
New Albany, July 27. --The Ledger says that the rebels congregated in considerable force at Hulverville, Ky., and boldly and defiantly insulted the Union citizens.
Passengers from Henderson say that guerrillas have appeared in strong force opposite Mound City.
It was feared they would attempt to burn the Union gunboats building there.
Neskville, July 27. -- The 10th Ohio regiment, guarding the Memphis and Charleston railroad, between Decatur and Courtland, was attacked yesterday by a large force of guerrillas and thirty or forty of the regiment were killed. The road was considerably damaged.
A large rebel force is reported near Tuscumbia-Forest is reported to be of Carthage, with the object of making a descent on the Louisville railroad.
New York, --News from Fort Monroe, today, that Gen. Jackson was demonstrating down the left bank of the James, made some stir here, and nervous people were very uneasy, until a later telegram was received announcing the arrival of Porter's mortar fleet, intended for Fort Darling, (Drury's Bluff,) made all right again.
