ls Hunter and Heintzelman were
approaching. About the same time we observed in motion a large
mass of the enemy, below and on the other side of the stone bridge.
I directed Captain Ayres to take position with his battery near our
right, and to open fire on this mass; but you had previously
detached the two rifle-guns belonging to this battery, and, finding
that the smooth-bore guns did not reach the enemy's position, we
ceased firing, and I sent a request that you would send to me the
thirty-pounder rifle-gun attached to Captain Carlisle's battery.
At the same time I shifted the New York Sixty-ninth to the extreme
right of the brigade. Thus we remained till we heard the
musketry-fire across Bull Run, showing that the head of Colonel
Hunter's column was engaged. This firing was brisk, and showed that
Hunter was driving before him the enemy, till about noon, when it
became certain the enemy had come to a stand, and that our forces on
the other side of Bull Run were all engaged, artillery and infantry.

Here you sent me the order to cross over with the whole brigade, to
the assistance of Colonel Hunter. Early in the day, when
reconnoitring the ground, I had seen a horseman descend from a
bluff in our front, cross the stream, and show himself in the open
field on this aide; and, inferring that we could cross over at the
same point, I sent forward a company as skirmishers, and followed
with the whole brigade, the New York Sixty-ninth leading.

We found no difficulty in crossing over, and met with no opposition
in ascending the steep bluff opposite with our infantry, but it was
impassable to the artillery, and I sent word back to Captain Ayres
to follow if possible, otherwise to use his discretion. Captain
Ayres did not cross Bull Run, but remained on that side, with the
rest of your division. His report herewith describes his
operations during the remainder of the day. Advancing slowly and
cautiously with the head of the column, to give time for the
regiments in succession to close up their ranks, we first
encountered a party of the enemy retreating along a cluster of
pines; Lieutenant-Colonel Haggerty, of the Sixty-ninth, without
orders, rode out alone, and endeavored to intercept their retreat.
One of the enemy, in full view, at short range, shot Haggerty, and
he fell dead from his horse. The Sixty-ninth opened fire on this
party, which was returned; but, determined to effect our junction
with Hunter's division,