There was a hurrying around in the darkness illumined by the flashing of torch-lights--a discordant calling of names--a careful inspection to see that none went but those allowed; then, forming two lines in the courtyard, and with bounding hearts, we passed _outward_ through the dreaded portals of Castle Thunder--the same portals we had passed _inward_ more than three months before! passed out into the cool, but _free_ night air! We next marched through the muddy, unlighted streets for many squares. There were with us a number of sick, who were not willing to be left behind; and as the rebels refused to provide conveyances, we helped them--encircling them in our arms, and supporting their tottering steps during the weary distance. Some had to be carried altogether, but the burden was light, upborne, as we were, on the wings of hope and exultation. After we were seated in the cars, we found in some Richmond papers the intelligence that "a large number of engine-thieves, bridge-burners, murderers, robbers, and traitors will leave this morning for the United States," also congratulating themselves on the riddance. Our congratulations were not less fervid! We glided slowly along, passing fortifications and rifle-pits, till we arrived at Petersburg; then onward to City Point, the place of general exchange. Here, for the first time in eleven months, we saw the "flag of the free," floating in proud beauty from the truce-boat "State of Maine." It was a glad sight! Her undulating stars were fairer to us than the brightest constellations that ever sparkled in the azure fields above. The grossest frauds are often practised by the unscrupulous secessionists in these exchanges. I will give a case that occurred at this time. A rebel soldier was wounded in the head at the first battle of Manassas. It affected his brain, and disordered his intellect, so that even after he had recovered physically, he was mentally unable to perform the duties of a soldier. He was confined a short time in Castle Thunder, and then sent to Camp Lee, to try him again. But he was no better than before, and they gave up the attempt in despair. Then they exchanged him to us, and got a _sound man_ in his place! When the boat rounded out from the shore on its homeward way, our joy knew no bounds. It seemed as if we had awakened from a hideous nightmare dream to find that all its shapes of horror and grinning fiends had passed away, and left us standing in the free sunlight once more. Our hearts beat glad music to the thresh of the wheels on the water, knowing that each ponderous stroke was placing a greater distance between us and our hated enemies. Then, too, the happy welcome with which we were greeted; and the good cheer, so different from our miserable prison fare, and the kind faces, smiling all around, showed in living colors that we were freemen again.