tries to stimulate enlistment of blacks, 132;
threatens retaliation for Southern excesses, 133;
shows signs of care and fatigue, 134;
never asks for sympathy, 135;
slow to displace McClellan until sure of a better man, 135;
doubtful as to Burnside's plan of attack, 136;
refuses to accept Burnside's resignation after Fredericksburg, 138;
declines to ratify Burnside's dismissals, 138;
his letter to Hooker, 139, 140;
suggestions to Hooker after Chancellorsville, 143, 144;