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Very Latest.

NEW YORK, July 13. — The American telegraph lines are again working directly through to Washington; at present they are occupied with official business.

NEW YORK, July 13. — The transport Dudley Buck, which arrived to-night from Hilton Head, spoke on the 10th instant to the United States steamers Margaret and Jesse, which reported having captured the day previous a blockade runner, and sent her to Boston.

BALTIMORE, July 14. — The trains are running as usual this morning to Washington.

NEW YORK, July 14. — The Commercial says a prominent banking house, on Wall street, have received a dispatch from their Washington branch this morning, which states that Grant's forces have occupied Petersburg. We have received nothing confirmatory of this statement. The Commercial also says a private dispatch from Washington to a Wall street banker, states that Sheridan, with his entire cavalry force, has been despatched to intercept the rebel raiders, and has reached Hanover Court House.

A Washington dispatch to the Philadelphia Inquirer, dated July 14th, A.M., says the enemy began their retreat across the Potomac about 12 o'clock last night. They had held Rockville, about five miles from the Potomac, as a base. This morning our forces started in pursuit, and we may be able to intercept their retreat south. They are carrying their plunder as well as impressed citizens with them. Our losses will not exceed 500. We made considerable captures.