Statistics for occurrence #1 of “Fort Warren” in chapter 1.2, page 40 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 7: Prisons and Hospitals.:
...marshals kept others under this charge in prisons scattered over the Confederacy.
Citizens charged with disloyalty in the North were confined in various places.
The Old Capitol, Fort Lafayette, Fort Warren , and dozens of other places were used for this purpose.
At the end of the war, Jefferson Davis was confined in Fortress Monroe, but this had been too near the lines during
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