The admiral remained in the North until the first of the following year. His own ship, and her powerful sisters, the Richmond and Brooklyn, were in need of extensive repairs before they could be considered again fit for winter service in the Gulf. The Hartford was in better condition than the other two, being uninjured below the water line, but the severe actions through which she had passed were proved by the scars, two hundred and forty in number, where she had been struck by shot or shell. CHAPTER X. MOBILE. 1864. By the fall of the last and most powerful of the Confederate strongholds upon the Mississippi, and the consequent assertion of control by the United States Government over the whole of the great water course, was accomplished the first and chief of the two objects toward which Farragut was to co-operate. After manifold efforts and failures, the combined forces of the United States had at last sundered the Confederacy in twain along the principal one of those natural strategic lines which intersected it, and which make the strength or the weakness of States according as they are able or unable to hold them against an enemy. Of the two fragments, the smaller was militarily important only as a feeder to the other. Severed from the body to which they belonged, the seceded States west of the Mississippi sank into insignificance; the fire that had raged there would smoulder and die of itself, now that a broad belt which could not be passed interposed between it and the greater conflagration in the East. It next became the task of the Union forces to hold firmly, by adequate defensive measures, the line they had gained; while the great mass of troops heretofore employed along the Mississippi in offensive operations were transferred farther east, to drive yet another column through a second natural line of cleavage from Nashville, through Georgia, to the Gulf or to the Atlantic seaboard. How this new work was performed under the successive leadership of Rosecrans, Grant, and Sherman, does not fall within the scope of the present work. Although the light steamers of the Mississippi squadron did good and often important service in this distant inland region, the river work of Farragut's heavy sea-going ships was now over. In furtherance of the great object of opening the Mississippi, they had left their native element, and, braving alike a treacherous navigation and hostile batteries, had penetrated deep into the vitals of the Confederacy. This great achievement wrought, they turned their prows again seaward. The formal transfer to Admiral Porter of the command over the whole Mississippi and its tributaries, above New Orleans, signalized the fact that Farragut's sphere of action was to be thenceforth on the coast; for New Orleans, though over a hundred miles from the mouth of a tideless river, whose waters flow ever downward to the sea, was nevertheless substantially a sea-coast city.