...d Birney with the 10th corps to make an advance on Richmond, to threaten it. Ord moved with the left wing up to Chaffin's [Chafin's] Bluff; Birney with the 10th corps took a road farther north; while Kautz with the cavalry took the Darby road, still farther to the north. They got across the river by the next morning, and made an effort to surprise the enemy. In that, however, they were unsuccessfu...