The lines East of the Blue Ridge.
Our advices from Gordonsville yesterday represent that everything continued quiet, the enemy having made no further demonstration above Richmond since his harmless dash upon the Central Railroad on Wednesday last. Gen. Pope has accumulated an army of over 30,000 men in the counties immediately this side of the Blue Ridge, and evidently designs some offensive operation, the nature of which may shortly transpire. A gentleman who came through Caroline county a day or two since informs us that he saw no Federal soldiers on his route, but this is no indication that they have withdrawn from that part of the country. We may add that the enemy has now but very few troops in Washington, Baltimore, or Annapolis, nearly all the available men having been sent to reinforce Pope and McClellan.