Saturday, September 12.—Morrisville. The Second corps left camp at ten o’clock A. M., marched to Bealton Station, from there to Rappahannock Station, going in camp for the night. The First and Fifth corps are camping near the fords. Our cavalry has crossed the river, and is skirmishing with the rebels; We marched ten miles to-day.

Sunday, September 13.—At Rappahannock Ford. The whole cavalry corps is across the river. The Second corps crossed about eight o’clock A. M., on a pontoon bridge. The cavalry and horse artillery are already fighting between Brandy Station and Culpepper Court House. We halted for an hour at Brandy Station, on the road to Culpepper. Three rebel guns, and twenty artillerymen, who were Maryland rebels, and well dressed, captured by Kilpatrick’s cavalry, were carried by. We arrived in Culpepper at six o’clock P. M. The view of the surrounding country is splendid. Our cavalry drove Stuart’s cavalry clear to Cedar Mountain, occasionally firing a gun at them. We were in line of battle, the artillery on the hills, and a part of the infantry around Culpepper Court House. Rain fell during the night.

Monday, September 14.—In line of battle at Culpepper Court House. The cavalry still fighting near the Rapidan.

Tuesday, September 15.—Culpepper Court House. Cannonading going on since morning.

Wednesday, September 16.—Culpepper Court House. At nine o’clock A. M., orders came for the Third division, our battery and Battery B, to advance. We marched through the town to Cedar Mountain, General Pope’s battle ground, and occupied the hill during the evening and night, in line of battle. We could see the rebel artillery fire on our cavalry at Raccoon Ford. Marched eight miles to-day. A very cold night.

Thursday, September 17.—Cedar Mountain. Left at ten o’clock, A. M., marching only three miles. Heavy skirmishing was going on during the afternoon at Robinson’s Creek. The rebels are in strong force on the Rapidan. Our battery went to camp near the woods in the evening. A heavy fall of rain all night.

Friday, September 18.—Near Robinson’s Creek. Two deserters, of the Fourteenth Connecticut regiment, were shot to-day, in presence of the Third division, Batteries A and B, Rhode Island. At the same time a fight was going on near the Rapidan.

Saturday, September 19.—Near Robinson’s Creek. We changed camp. The battery was hitched up until four o’clock P. M. Quiet until

Tuesday, September 22.—A cavalry fight took place on the other side of Robinson’s Creek.

Wednesday, September 23.—Robinson’s Creek. Fighting going on all the afternoon. We can see the troops manœuvring on the other side of the creek. Artillery was firing rapidly. Afterwards we found out that Kilpatrick’s cavalry returned from a reconnoissance, the enemy disputing his passage fiercely.