oon. Having settled down for the
night, we were suddenly aroused and ordered to march immediately to
Sharpsburg. An engagement was going on at Shepardstown, close to the
Potomac, ending to our disadvantage. We passed through Sharpsburg at two
o'clock in the night, and went into park outside of the town.

_Sunday, September 21._--Sharpsburg, McClellan's headquarters. Cannonading
still sounding from the Potomac. There is scarcely a house in Sharpsburg,
which shows no marks of our artillery fire. The inhabitants admit that
General Burnside gave them a right smart shelling.

_Monday, September 22._--Sharpsburg, headquarters of McClellan. Sumner's
corps marched to Harper's Ferry to-day; but we remained, receiving a new
battery of three-inch rifle guns.

_Tuesday, September 23._--Sharpsburg. We left the place at two o'clock P.
M. Crossed the Antietam, and marched to the foot of Maryland Heights,
going to camp for the night.

_Wednesday, September 24._--We arrived at Harper's Ferry at ten o'clock
A. M., and went to camp on Bolivar Heights.

_Sunday, September 28._--Bolivar. Mounted inspection.

_Wednesday, October 1._--President Lincoln visited the Army of the
Potomac. Our battery fired a salute of twenty-one guns.

_Friday, October 3._--Bolivar. Mounted inspection.

_Sunday, October 5._--Bolivar. Mounted inspection. The Seventh Regiment,
Rhode Island infantry, arrived at Sandy Hook, Maryland.

_Thursday, October 9._--Bolivar. We were paid off for five months service.

_Thursday, October 16._--Bolivar. Reconnoisance in force. Ten thousand men
started early in the morning under command of General Hancock. The enemy
was found near Charlestown, opening on us with artillery. Battery A,
Fourth Regular Artillery, went into action. Our battery supported the
Fourth regulars, and the enemy's battery left soon. Battery A, Fourth
regulars, had a caisson blown up, one man killed and four wounded. We
occupied Charlestown, going in position outside of the town, pointing to
Berryville and Smithfield. Heavy rain in the evening. The cars were
running between Harper's Ferry and Charlestown all night, carrying off
grain from the latter place to Harper's Ferry. The troops were in line of
battle during the night.

_Friday, October 17._--Charlestown, Virginia. In position. We left
Charlestown at two o'clock P. M. Marched back to Halltown. At that place
General Hancock formed a line of battle, an attack of the rebels being
anticipated. A