A Northern gentleman who was pressed into the rebel service, but escaped, states that all sorts of rumors were prevailing in the South relative to the Federal administration. It was positively stated that General Scott and Mr. Lincoln were at loggerheads, that the latter was closely guarded to prevent being assassinated, with many other foolish and absurd stories. All are impressed with the idea that the present is a war of subjugation, and the enslavement of the Southerners.

The same person states that large bodies of troops are passing into the various towns of Eastern Virginia. Provisions were becoming scarce, and enormous prices were being paid for them.

Two Northern men, suspected of being spies, were hung at Culpepper last week. At this point there was a great number of troops. Our informant estimates them at possibly 15,000 men. There were one hundred and sixty-five cannons sent two weeks ago to be distributed through the towns between Norfolk and Harper's Ferry. The latter point received a compliment of twenty-one.

The reign of terror in Virginia is terrible. Every man not in the ranks is looked upon as a traitor. Many Northern as well as Union men have been compelled to take up arms in defence of the Rebellion. These men will not fight, and we may rest assured that when the opportunity offers, they will desert the rebels.

The third and fifth Pennsylvania regiments volunteers, camped at Camp Scott, left for Chambersburg at an early hour Tuesday morning. Captain Campbell's company of flying artillery, now quartered at Camp Curtin, have been ordered to the same post. Other troops are to be concentrated there forthwith. There is to be a reinforcement of 10,000 at Camp ?? this week. This rapid movement, in connection with the ordering of military store wagons to be immediately fitted out and forwarded to the same points, show that something soon will be done against Harper's Ferry. There is work for our Pennsylvanians, who, though in rags, will fight well and gallantly.

The State Army Medical Board meets to-day. The applicants are numerous, mostly confined, however, to young graduates of inexperience.

Two columbiads, destined for Fortress Monroe, passed through here from Pittsburgh.

The Fourteenth and Fifteenth Pennsylvania regiments, stationed at Camp Jameson, Lancaster, have received marching orders. They will go to Chambersburg.

There are vague rumors from Harper's Ferry of a skirmish between the Virginians and Marylanders, but none of them are true. The rebels threaten to make a desperate stand there, but it is not believed by the military officers at Chambersburg that much fighting will be done.

The forces opposite Williamsport have begun to evacuate their position, which is untenable. They have pickets out even into Maryland. The whole camp there was fright on Sunday night, by the alarm token by the outside sentry, who thought the tramping of a lot of horses which had escaped from an enclosure, and the voices of their pursuers, were the sounds of an approaching company of cavalry. The picket guard fled across the Potomac, giving the alarm, when the whole camp was roused to arms. There was no more sleep that night among the rebels. They will fall back at once on Harper's Ferry.

A messenger arrived here yesterday, deputed by the citizens of Hagerstown, Md., for the purpose of securing a supply of arms for the Union men in that vicinity. The secessionists of Maryland are concentrating between that point and Williamsport, and the citizens of that region are entirely defenseless. Measures will undoubtedly be taken by our State authorities to furnish the loyal people with arms for the protection of their lives and property. Hagerstown is the centre of one of the Union strongholds of Maryland.

An attempt was made to fire the Capital here last evening, but it was timely discovered and prevented.

Quartermaster General Hale has published a card explanatory of his refusal to furnish shoes and clothing to barefooted and ragged soldiers. It throws no light upon the shameful transaction.

Clothing has been ordered to be forwarded immediately to the Pennsylvania regiments at Washington, who are represented to be in a tattered plight.