...ant remounts of fresh horses.--Fitzhugh Lee, with a rebel cavalry force, crossed the Rappahannock River near Corbin's Neck, six miles below Fredericksburgh, but was soon driven back by the brigade of General Custer , with a loss in prisoners of three engineer officers, and a number of privates killed and wounded. The Union loss was slight.--the Richmond Whig of this day contained the following: A Southern pape...