Statistics for occurrence #1 of “Forts Warren” in chapter 14 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 8: Soldier Life and Secret Service.:

...suppressed. The police commissioners of Baltimore were arrested, as was also a portion of the Maryland legislature. So active was the multifarious work of the Secret Service that the prisons at Forts Warren , Lafayette, and McHenry were soon overflowing with prisoners of state and war. Distracted wardens pleaded that there was no room for more, but it was not until the middle of February, 1862, that reli...
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