..., slowly but steadily driving the enemy before them. In the mean time, Hooker had completed his bridges, crossed the Chattanooga, and moved north, parallel with the ridge; Osterhaus on his right, Geary on the left, and Cruft having the centre. The rebels had selected for their line of defence, in front of Hooker, the breastworks thrown up by the national troops in their retreat from Chickamauga;...