Federal account of a Skirmish.
Washington, Sept. 12.
--At 7 o'clock this morning, a large party of the New York Highlanders left Chain Bridge as skirmishers.
The Confederates fell back seven miles and the Federals commenced retreating, when the Confederates opened fire with shell, which was replied to by Griffin's battery.
The Federals ceased firing in twenty minutes, in order to give the Confederates an opportunity to meet them in open field.
On the resumption of the firing, the Federals used 32-pounder shells, which drove the Confederates off.