A month of arduous toil and continuous activity on foot, on deck, and on horseback followed. On the river and in Tennessee and in Mississippi the tireless news-gatherer plied his tasks. Then came tidings of the capture of New Orleans, the evacuation of Fort Pillow, in or near which Carleton wrote two of his best letters; the retreat of the Confederates from Memphis, and the annihilation of the rebel fleet in a great water battle, during which Carleton had the very best position for observation, only two other journalists being present to witness it with him. Owing to a week's sickness, he did not see the battle of Shiloh or Pittsburg Landing, but he arrived on the ground very soon after, and went over the whole field with participants in the struggle and while the debris was still fresh. He made so thorough a study of this decisive field of valor, that he was able to write with notable power and clearness both in his letters at the time and later in his books. We find him in Chicago, June 17th, in Boston, June 21st, where, in one of his letters, numbering probably about the two hundredth, he welcomes the sweet breezes of New England, her mountains, the deep-toned diapason of the ever-sounding sea, the green fields, the troops of smiling children, the toll of church bells, and the warm grasp of hands from a host of kind-hearted friends; and, best of all, the pure patriotism, the true, holy devotion of a people whose mighty hearts beat now and ever "for union and liberty, one and inseparable." CHAPTER X. AT ANTIETAM AND FREDERICKSBURG. The opening of the battle-summer of 1862 found the seat of war in the East, in the tidewater region of Virginia. These were the days when "strategy" was the word. General George B. McClellan's leading idea was to capture Richmond rather than destroy the Confederate army. His own forces lay on both sides of the Chickahominy, in the peninsula below Richmond. The series of five battles had already begun when Carleton arrived in Baltimore, July 2d. A peremptory order from Washington having stopped every one from reaching Fortress Monroe, he had therefore to do the next best thing as collector and reviser of news. After studying the whole situation, he wrote a long and detailed letter from Baltimore.