Harper’s Ferry, Oct. 3.—The railroad bridge was completed yesterday, and trains of cars passed over it into Harper’s Ferry to-day, with troops and munitions of war and army stores. The Winchester road is being put in order, and trains will run at once to and beyond Bolivar Heights.

There is much uncertainty here as to the movements of the army. A strong advance will undoubtedly be made into Virginia, but whether it will be by way of Harper’s Ferry or over the Williamsport Ford, no one has the slightest idea. So long as the Confederates lies in his present position it is said no hurry will be evinced on our part to disturb him.—A large body of the Confederates are still at Failing Waters, and at Bunker’s Hill in the rear of Martinsburg, whilst a few regiments are at Charlestown, their pickets meeting those of Genera! Sumner about three miles this side of that place.