n of Artillery, and
opened a brisk fire upon a column of the Enemy's Infantry, supposed
to be two regiments, advancing towards me, and supported by his
battery of rifled cannon on the hills opposite. These poured into
my section a steady fire of shot and shell. After giving them some
fifty rounds, I succeeded in heading his column, and turned it up
Bull Run to a ford about one mile above Stone Bridge, where, with
the regiments which followed, they crossed, and proceeded to join
the rest of the Enemy's forces in front of the main body of our
Army."]

Before this developing, expanding, and advancing attack of the Union
forces, the Rebel General Bee, who--since his coming up to support
Evans, with his own and Bartow's Brigades, to which had since been added
Hampton's Legion,--has been in command of this new Rebel line of defense
upon the left of the Bull Run line, concludes that that attack is
getting too strong for him, and orders his forces to retreat to the
Southward, and re-form on a second line, parallel to their present line,
and behind the rising ground at their rear. They do so, somewhat faster
than he desires. The whole line of the Rebel centre gives way, followed
by the wings, as far as the victorious Union troops can see.

We must be blind if we cannot perceive that thus far, the outlook, from
the Union point of view,--despite numberless mistakes of detail, and
some, perhaps, more general in their character--is very good. The "Boys
in Blue" are irresistibly advancing, driving the "Rebel Gray" back and
back, without let or hindrance, over the Buck Hill ridge, over Young's
Branch, back to, and even over, the Warrenton Pike. Time, to be sure,
is flying--valuable time; but the Enemy also is retiring.--There is some
slight confusion in parts of our own ranks; but there is much more in
his. At present, we have decidedly the best of it. McDowell's plan has
been, thus far, successful. Will that success continue? We shall see.

Heintzelman's Division is coming, up from the rear, to the Union right
--Franklin's Brigade, made up of the 5th and 11th Massachusetts, and 1st
Minnesota, with Ricketts's splendid battery of six 10-pounder Parrotts,
forming on the right of Andrew Porter's Brigade and Division; while
Willcox's demi-Brigade, with its 11th ("Fire Zouaves") and 38th New
York--having left Arnold's Battery of four pieces, with the 1st Michigan
as its support, post