From the Richmond Examiner, 3/24/1866, p. 3, c. 5
CASTLE THUNDER late a prison, but now a factory again, is about to share the fate of all noted bastiles. It has been taken or leased for a speculation, and while certain improvements and alterations are in progress – its interior will be exhibited to visitors at twenty-five cents per head. The Old Capitol prison at Washington, D. C., is, or has been on exhibition, and why not Castle Thunder? The “horreurs” of Castle Thunder, according to Northern army correspondents and runaways exceeded by ten-fold the horrours of any prison in the Confederacy. Let it go upon exhibition.