Black Hole of Calcutta, scene of an incident on June 20, 1756, in which a number of Europeans were imprisoned in Calcutta (now Kolkata) and many died.
The nawab attacked Calcutta because of the company’s failure to stop fortifying the city as a defense against its rivals in anticipation of war (the Seven Years’ War, 1756–63).
Following the surrender, Holwell and the other Europeans were placed for the night in the company’s local lockup for petty offenders, popularly known as the Black Hole.
It was a room 18 feet (5.5 metres) long and 14 feet (4 metres) wide, and it had two small windows.
According to Holwell, 146 people were locked up, and 23 survived.
The incident was held up as evidence of British heroism and the nawab’s callousness.
However, in 1915 British schoolmaster J.H. Little pointed out Holwell’s unreliability as a witness and other discrepancies, and it became clear that the nawab’s part was one of negligence only.
The details of the incident were thus opened to doubt.
A study in 1959 by author Brijen Gupta suggests that the incident did occur but that the number of those who entered the Black Hole was about 64 and the number of survivors was 21.