Prisoners on board the Neptune included Irish nationalist John Mitchell, who preached social revolution in Ireland during the Famine. He later became a proponent of slavery in America and supported the Confederate States  during the American Civil War. Photograph: Wikicommons

Towards the end of 1847, the worst year of the Great Irish Famine known as “Black 47”, an exhibition opened at the Rotunda in Dublin depicting the Bos(...)