...n wounded.--Baltimore American. A spirited cavalry engagement occurred at Kelly's Ford, on the Rappahannock River, Va., between a strong reconnoitring force of Union troops under the command of Gen. Averill , and a body of rebel cavalry under Gen. Fitz-Hugh Lee, in which the latter, after a most desperate struggle, of four hours duration, were repulsed, and finally routed and pursued for a distance of si...