A Yankee dash on New Kent.
At daylight yesterday morning a company of Yankee cavalry made a dash on the pickets stationed below New Kent Court-House. The pickets were wide awake, however, and gave them a salute, and ran in, none of them being captured. Finding their plan, whatever that was, frustrated, the cavalry wheeled and went back in a hard gallop in the direction of Williamsburg, from whence they came.