consequences! What can it be? We shall see.

While Tyler's Artillery has been cannonading the Rebel left, under
Evans, at Stone Bridge,--fully impressed with the prevailing Union
belief that the bridge is not only protected by strong masked batteries,
heavy supports of Infantry, and by abatis as well as other defenses, but
is also mined and ready to be blown up at the approach of our troops,
when in reality the bridge is not mined, and the Rebel force in men and
guns at that point has been greatly weakened in anticipation of
Beauregard's projected advance upon Centreville,--the Union column,
under Hunter and Heintzelman, is advancing from Centreville, in the
scorching heat and suffocating dust of this tropical July morning,
slowly, but surely, along the Warrenton Pike and the cross-road to
Sudley Springs Ford--a distance of some eight miles of weary and
toilsome marching for raw troops in such a temperature--in this order:
Burnside's Brigade, followed by Andrew Porter's Brigade,--both of
Hunter's Division; then Franklin's Brigade, followed by Willcox's
Brigade,--both of Heintzelman's Division.

It is half past 9 o'clock; before Burnside's Brigade has crossed the
Bull Run stream, at Sudley's Ford, and the head of Andrew Porter's
Brigade commences to ford it. The troops are somewhat slow in crossing.
They are warm, tired, thirsty, and as to dust,--their hair and eyes and
nostrils and mouths are full of it, while most of the uniforms, once
blue, have become a dirty gray. The sky is clear. The sun already is
fiercely hot. The men stop to drink and fill their canteens. It is
well they do.

McDowell, who has been waiting two or three hours at the turn, impatient
at the delay, has ridden over to the front of the Flanking column, and