When it opened in 1796, Kilmainham Gaol was supposed to be a model prison—airy, perched atop a hill, large enough that prisoners were not just tossed into a heap, but given separate quarters. It soon became a byword for hell. Debtors were locked away and forgotten. In the famine years, the jail was a warehouse of the hungry, their crimes dominating the ledgers—“attacking a bread cart,” “stealing a goose,” “being in possession of stolen butter.” And the design was significantly flawed in one respect: the impenetrable fortress was made of limestone blocks, which not only held the moisture from
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