...le confirmation of his chief's conclusions; whereupon, the residue of Longstreet's corps was moved rapidly eastward. Meantime, Gen. Sumner's advance had reached Falnouth, and attempted to cross to Fredericksburg , but been easily repulsed; the bridges being burned and our pontoons — owing to a misunderstanding between Gens. Halleck and Burnside, each of whom conceived that the other was to impel their d...