To-day Professor Lowe went into the rebels' country as far as Fall's Church with his balloon, from which place he made several ascensions. He was so far towards Fairfax Court House that his appearance in the air created a report here that the rebels had an opposition balloon. He was escorted into the interior by one company of the Eighth New York regiment. Major Colburn, of the Connecticut regiment, accompanied Professor Lowe in his voyage, and made a sketch of the enemy's country that was so correct, that Virginians who were familiar with the vicinity of Fairfax Court House, at once recognized it, and named the roads, lanes, streams, and dwellings. A small encampment of rebels was discovered near Fairfax Court House. Maps of the whole country occupied by the enemy will be taken by these balloon ascensions, under the superintendence of Professor Lowe.--N. Y. Herald, June 26.
The Thirty-seventh regiment N. Y. S. V., commanded by Col. John H. McCunn, left New York for Washington.--(Doc. 33.)
Major-General McClellan issued from his Headquarters at Grafton, Va., a proclamation “to the inhabitants of Western Virginia” and another “to the soldiers of the army of the West.” He has now taken command of the Western Virginia forces in person, and intends to prosecute the war vigorously.--(Doc. 34.)