August 29th. Early this morning received orders to march to the old Bull Run battlefield, to the assistance of General Pope, who, report says, is getting much the worst of the fighting. Bull Run seems a fatal stream for us. Our entire division fell in, taking the road to Alexandria for a while, then turning off to the left, passed in front of Washington, and halted on the glacis of Fort Corcoran, bivouacking there for the night.