Passing through Petersburg, the streets of which were gay with the feathery-brown blooms of the Venetian sumach, but almost deserted by human beings, who have not returned to the city since they were driven out by the shot and shell of which their houses show the scars, we were soon in the rebel works. There are sixty miles of these works in all, line within line, three deep: alternations of sand-pits and sand-heaps, with here and there a tree-trunk pierced for riflemen, and everywhere a double row of _chevaux de frise_. The forts nearest this point were named by their rebel occupants Fort Hell and Fort Damnation. Tremendous works, but it needed no long interview with Grant to understand their capture. I had not been ten minutes in his office at Washington before I saw that the secret of his unvarying success lay in his unflinching determination: there is pith in the American conceit which reads in his initials, “U. S. G.,” “unconditional-surrender Grant.” The works defending Richmond, hardly so strong as those of Petersburg, were attacked in a novel manner in the third year of the war. A strong body of Federal cavalry on a raid, unsupported by infantry or guns, came suddenly by night upon the outer lines of Richmond on the west. Something had led them to believe that the rebels were not in force, and with the strange aimless daring that animated both parties during the rebellion, they rode straight in along the winding road, unchallenged, and came up to the inner lines. There they were met by a volley which emptied a few saddles, and they retired, without even stopping to spike the guns in the outer works. Had they known enough of the troops opposed to them to have continued to advance, they might have taken Richmond, and held it long enough to have captured the rebel president and senate, and burned the great iron-works and ships. The whole of the rebel army had gone north, and even the home guard was camped out on the Chickahominy. The troops who fired the volley were a company of the “iron-works battalion,” boys employed at the founderies, not one of whom had ever fired a rifle before this night. They confessed themselves that “one minute more, and they‘d have run;” but the volley just stopped the enemy in time.