DEATH OF GENERAL RENO.

Washington, Sept. 15.

An officer slightly wounded in the battle yesterday, who arrived here late to-day, represented that the fight took place three or four miles from Middletown, Frederick county, at the foot of the first mountain going west. The enemy were strongly posted there, but our men, with the most determined courage, drove them up the mountain, through a strip of woods, cornfields and open ground. The rebels made occasional stands behind walls and fences, but were driven thence to the top of the mountain and over into the valley, where, it being now night, our troops were called from further pursuit. Not one of our men faltered. This part of the contest was maintained by our troops of the centre. Two colonels were among the rebel slain found on the field this morning.

A dispatch received from Greencastle, Pa., eleven miles from Hagerstown states that much excitement prevailed there last night on account of the reports of an advance of the Confederates on the last named place. They are said to be moving by way of Cavetown, seven miles east, but up to 5 P. M. there were no signs of them in the vicinity of the town.—Another dispatch from Harrisburg confirms this statement. Considerable alarm was occasioned at Harrisburg last night by the supposition that the Confederates had reached some point on the Northern Central railroad, as the operatives had detected an expression indicating that the telegraph had been tampered with. A still later dispatch states that the Confederates had not entered Hagerstown at 6 P. M. The Northern Central railroad was still unmolested at midnight. Gen. Wool has been assigned to the command of all the troops north of the Susquehanna.

Annapolis, Monday Evening, Jan. 6, 1862.

To day the embarkation of the troops has been going forward. Several sad accidents have occurred, resulting in the death of several men, one of whom belonged to the Massachusetts twenty-third. While that regiment was waiting to embark, several members of Company C went to a saloon. Here Thomas Butler of that company was accidentally shot dead by one of his comrades named William Beecher, who was playfully going through the manual exercise with a gun not his own.

The Rebels Try to Destroy Dam No. 6.

WILLIAMSPORT, MD., Dec. 20.—Affairs in and around this vicinity are quiet, though we expect to have an exchange of shots with the enemy at Dam No. 5 and Falling Waters. Gen. Jackson’s (rebel) battery is at the former place, including a 12-pounder rifled gun, and the enemy have been at work endeavoring to destroy tho dam there, which now seems to bo the principal object of their demonstrations. Their firing is returned by two Parrott guns belonging to Knapp’s Pennsylvania battery.

Attempt the Rebels to Cross the River at Falling Waters—Probable Engagement.

Frederick, Dec 18—A gentleman who arrived from Williamsport late last night reports that Gen. Jackson’s rebel brigade has been largely reinforced, and is supposed to amount to 9,000 men, now at Falling Waters. At 9o’clock p m. 51 wagons belonging to the rebels were backed down to the shore, and a boat from each quietly launched into the river. Two of the boats were of large size, for the transportation of artillery. At this juncture our informant left for General Banks’ headquarters. He thinks the object of Jackson is to cross the river, make a dash on Williamsport, and secure the stores and arms there. He informed Col. Leonard of all that was transpiring, and thinks the latter has taken full precautions to prevent it by removing the stores, etc., to a more secure place, and that he also took steps to concentrate all his available force to prevent the passage of the river.