A Diary of American Events.

August 18.—Lieutenant Bross, with a detachment of the Engineer regiment, on an expedition about twelve miles south of Pocahontas, Ark., was attacked by Colonel Street’s company, at a point where defence was difficult After a brief skirmish, Lieutenant Bross drew his men in line of battle, and charged upon the rebels, who broke and ran. They were chased for five miles, when four were captured, with several of their horses and mules. Colonel Street was among those pursued. He was subsequently discovered and chased, and pressed so hard, that he jumped from his horse, and hid himself in a swamp and undergrowth. In Street’s saddle-bags were found the pay-roll of a company of the First Mississippi militia, as follows: One hundred and fifty men all told, twenty-two prisoners of war, forty-two absent without leave, and nine turned over to another company, leaving his present strength seventy-one men. — The British steamer Hebe was run ashore near New-Inlet, N. C., and afterward destroyed by the United States steamer Niphon. One of the Niphon’s boats was swamped, and her crew captured by the rebels, who lined the shore, firing on the boats charged with the destruction of the Hebe.—The Forty-seventh regiment of Massachusetts volunteers, under the command of Colonel Marsh, returned to Boston, from the seat of war.—The bombardment of Fort Sumter was continued.