JULY 2D.—There has been some brilliant fighting by several brothers named Ashby, who led a mounted company near Romney. One of the brothers, Richard, was slain. Turner Ashby put half a dozen Yankees hors du combat with his own arm. He will make a name. We have accounts of an extraordinary exploit of Col. Thomas, of Maryland. Disguised as a French lady, he took passage on the steamer St. Nicholas at Baltimore en route for Washington. During the voyage he threw off his disguise, and in company with his accomplices, seized the steamer. Coming down the Bay, he captured three prizes, and took the whole fleet into Fredericksburg in triumph. Lieut. Minor, C. S. N., participated in this achievement. Gen. Patterson, who conciliated the mob in Philadelphia, which had intended to hang me, seems to be true to his pledge to fight the Southern people. He is now advancing into Virginia at the head of a brigade.