http://www.youtube.com/watch?v=4xYERxQfG_U
http://en.wikipedia.org/wiki/Black_Hole_of_Calcutta
The Black Hole of Calcutta was a small dungeon in the old Fort William, at Calcutta, India, where troops of the Nawab of Bengal, Siraj ud-Daulah, held British prisoners of war after the capture of the Fort on 19 June 1756.
One of the prisoners, John Zephaniah Holwell, claimed that following the fall of the fort, British and Anglo-Indian soldiers and civilians were held overnight in conditions so cramped that many died from suffocation, heat exhaustion and crushing. He claimed that 123 prisoners died out of 146 prisoners held.
However, the precise number of deaths, and the accuracy of Holwell's claims, have been the subject of controversy.