PHILADELPHIA, JUNE 15. – A despatch from Greencastle, dated 10.30 A. M., reports that our troops were then passing there in retreat from Hagerstown to Chambersburg. Hagerstown had been evacuated, and all the stores and rolling stock of the railroad removed. Rumor fixes the rebel forces at ten thousand, which is probably an exaggerated.
CHAMBERSBURG, JUNE 15. – Lieut. Palmer has just returned to this place. He had to fight his way out, two miles this side of Greencastle. He reports the enemy advancing in three columns; one toward Waynesboro and Gettysburg, one direct to Chambersburg, and one toward Mercersburg and Cave Mountains. It is not known whether they will proceed in short columns or concentrate. A large fire is now seen in the direction of Greencastle Lieut. Palmer reports the column at Greencastle to be about five thousand strong, principally cavalry, supported by infantry and artillery.