replaces Burnside in command, 138;
letter of Lincoln to, 139, 140;
his abilities, 140;
in Chancellorsville campaign, 140-142;
throws away chance of success, 141;
fails to use all of troops, 142;
orders retreat, 142;
wishes to resume attack, 143;
first prevented, then urged by Lincoln, 143, 144;
wishes to capture Richmond, 144;