During the march we made an exciting dash upon a band of guerillas, who were watching for us, expecting to make some captures. But they were disappointed, for we were not only prepared to resist them, but would have captured them but for the superior fleetness of their horses. After accomplishing the work we were sent out to do, and resting one night, we returned to the regiment.

August 22.—This is my natal day. I find myself twenty-two years of age. I am not surrounded on this anniversary, as in former years, by the friends of my childhood. But memories of the past come trooping up in such vivid lines, as to make the day one of deep interest.

August 28.—My company, which forms a part of Captain Mitchell's battalion, is doing picket-duty at present with the battalion on the Rappahannock between Banks and United States Fords. My company is at the captain's headquarters, and acts as grand guard.

Sunday, August 30.—To-day I accompanied the division and brigade officers of the day in their visit to and inspection of the pickets along the Rappahannock. Our ride was very pleasant. Captain Barker, of the Fifth New York Cavalry, dined with Captain Mitchell and myself. He is a lively companion; was in the hands of Mosby last Spring; and has a fund of amusing and interesting incidents of army-life with which to enliven his conversation.

On the last day of August, Captain Mitchell was ordered to report to the regiment at Hartwood Church, with his reserves. The pickets are to remain on the river until attacked by the enemy or recalled by orders from division headquarters.

CAVALRY GUNBOAT EXPEDITION.

September 4.—To break the monotony of picketing and to subserve the cause of freedom, a most novel scheme was lately undertaken, known as Kilpatrick's Gunboat Expedition. The object was to destroy a portion of the Rebel navy anchored in the Rappahannock, near Port Conway, opposite Port Royal. This peculiar kind of warfare, which required genius and dash, was waged by the troopers with complete success, and they returned to their bivouac fires to enliven the weary hours with stories of their long march down the river, and their destructive charge upon the gunboats of the enemy. The expedition set out about two o'clock on the morning of September first.

Doctor Lucius P. Woods, Surgeon-in-Chief of the First Brigade, Third Division, gives the following interesting description of the above raid in a letter to Mrs. Woods:

"I returned yesterday after a three days' expedition after gunboats! We all laughed at the order sending cavalry after such craft, but I am happy to say that the object of the expedition was accomplished. We left camp at two o'clock A. M., marched all day and all the following night, till three o'clock next morning, when we made a furious charge upon Rebel infantry. They ran so fast as to disarrange the general's plan of attack. The morning was so dark that we could not see one rod in advance.

"We captured twelve or fifteen prisoners, and General Kilpatrick gave orders in their hearing to have the whole command fall back, stating that the gunboats would be alarmed and the expedition be a failure. The general took particular pains to allow half the prisoners to escape and to get across the Rappahannock. After falling back two miles, we were countermarched toward the river, near which we were formed in line of battle. We sat there on our horses waiting for daylight. Then the flying artillery of ten guns, supported by the old Fifth New York and First Michigan, dashed at a full run down to the river-bank, wheeled into position, and gave the Rebels a small cargo of hissing cast-iron, which waked them up more effectually than their ordinary morning-call. They soon came to their senses, and for half an hour sent over to us what I should think to be, by the noise they made, tea-kettles, cooking-stoves, large cast-iron hats, etc. But our smaller and more active guns soon silenced theirs, and drove the gunners away, when we turned our attention to the boring of holes in their boats with conical pieces of iron, vulgarly called solid shot. I am sure I can recommend them as first-class augers, for they sank the boats in time for all hands to sit down to breakfast at half-past nine o'clock. The repast consisted of muddy water, rusty salt-pork, and half a hard cracker, termed by us "an iron-clad breakfast." We were absent from camp three days, and had only nine hours' sleep."