Saturday, 4th.—Took Carlisle and Baltimore pike through Papertown and Mt. Holly Gap. Severe storm. At Hunter's Run 23rd, the advance company excepted, countermarched to Mt. Holly paper mill. Crossed the run a little before dark. Regiment arrived at Laurel Forge in detachments during the night, men covered with mud, and exhausted with hunger and fatigue. Distance 17 miles.
Sunday, 5th.—At 8 a.m., resumed march. At Pine Grove Iron Works turned to the left and ascended a heavy mountain, on the summit of which halted and bivouacked in support of a masked battery planted at a cross-roads in a grove. Day sultry followed by rainy night. Many of the men without food, and all with but a scanty supply. Distance 5 miles.
Monday, 6th.—Rations furnished. About middle of forenoon moved forward. Reached Cashtown, on the Chambersburg and Gettysburg pike, about 8 o'clock. Bivouacked in an orchard. Nothing to eat. Day cloudy and comfortable; roads heavy. Distance 16 miles.
Tuesday, 7th.—Ordered to march for Gettysburg, but countermanded. Proceeded in the direction of Chambersburg some seven miles, where took road to Altodale, Pa. Halted near that village about 4 p.m. Day fair; roads heavy; rations distributed. Distance 12 miles.
Wednesday, 8th.—Rain set in again about 1 a.m., and soon grew to a furious storm. The whole camp helplessly at its mercy. At 8 a.m., took road again. Marched a little beyond Waynesboro', and formed a junction with Army of Potomac. Day pleasant; roads very heavy. Distance 11 miles.
Thursday, 9th.—Rested. Muster rolls of 23rd gave largest number during the campaign, viz: 519 officers and men.
Friday, 10th.—Out for reconnoissance in company with 71st N.Y. Under arms all day in a bare field beneath broiling sun. Returned to camp about dark. Distance 8 miles.
Saturday, 11th.—p.m., column moved toward Hagerstown, the 23rd having the advance. Bivouacked a mile beyond Lettersburg. Company B, 23rd, detailed for picket duty at the front. Evening pleasant. Distance 5 miles.
Sunday, 12th.—Countermarched to Lettersburg where took the Cavetown road, reaching the latter place about noon. Here encountered another terrific thunder storm. Several men of the 56th N.Y., struck by the electric fluid, and one of them killed. Fresh beef rations furnished. Bivouacked in a field which the rain flooded and converted into mire. Roads pretty good and morning comfortable. Distance 9 miles.
Monday, 13th.—Marched toward Boonsboro'. Bivouacked at dark in a rough, stony field, the fires of different encampments of the Army of the Potomac visible in the distance. Rained much through the day; very muddy. Distance 10 miles.