primary source article about the battle of bull run 1861

Here is an eyewitness report of the Union rout from the first battle of the Civil War, Bull Run (July 21, 1861):

“Leaving my carriage, I went to a high point of ground and saw, by the dense cloud of dust that rose over each of the three roads by which the three columns of the [Federal] Army had advanced, that they were all on the retreat. Sharp discharges of canon in their rear indicated that they were being pursued.”