...ppahannock above Fredericksburgh were closely guarded by our cavalry, and the brigade of General W. H. F. Lee was stationed near Port Royal to watch the river above and below. On the twenty-eighth, General Hampton , guarding the upper Rappahannock, crossed to make a reconnoissance on the enemy's right, and, proceeding as far as Dumfries and Occoquan, encountered and dispersed his cavalry, capturing two squadron...