In these same streets, where Captain Briggs with his telescope witnessed the successful charge of the scouting party, raged the battle hotly on the sixth of July. But, as the Rebel infantry was advancing with heavy artillery to the aid of Stuart's cavalry, Kilpatrick was sorely pressed, and, at length, compelled to retire. His ears were now saluted with the sound of artillery in the direction of Williamsport, and a messenger arrived with the intelligence that General John Buford, who had advanced through the South Mountain Pass, was now attempting to destroy Lee's immense supply train, which was packed near Williamsport, and not very heavily guarded. Kilpatrick desired no better work than to assist his brave comrade, and he at once hastened down the main road, and soon joined Buford in the work of destruction. These combined commands were making fearful havoc in the Rebel commissary and quartermaster stores. Many wagons were burned, and the whole train would have shared the same fate had not the united infantry and cavalry of the enemy come down upon us in overwhelming force. But we were not to be driven away very suddenly nor cheaply. Long and desperately we contended with the accumulating forces, until darkness came on, when we found ourselves completely enveloped by the foe. Nothing but splendid generalship and true bravery on the part of our officers and men saved us from capture and destruction. Some of our number were made prisoners, but our losses were very small considering the amount of depredations we had committed, and the great danger to which we were exposed. As it was, the commands were successfully withdrawn from their hazardous position, and through the darkness of the night we crossed Antietam Creek, and bivouacked in safety on the opposite bank. Several prisoners were captured from the Rebels during the fights of the day. They were mostly from Alabama and Louisiana regiments; and they state that their army is all together, and well on its way to the river. They speak doubtfully of Lee's recrossing the Potomac. [Illustration: THE CAVALRY BIVOUAC.]