It took place at Fort William and was more a result of the negligence than the hostile intent of Suraj-ad-Daulah, though it still became a rallying cry to justify British imperialism.  
In a 1915 article J.H. Little attacked the only primary account of this event, that of John Zephaniah Holwell.  The maximum death toll is likely in the 40s rather than the 123 claimed by Holwell.  It took place at Fort William and was more a result of the negligence than the hostile intent of Suraj-ad-Daulah, though it still became a rallying cry to justify British imperialism.  Occurring on June 20th of 1756, FTP, what was this incident in which the Nawab of Bengal supposedly imprisoned 146 European prisoners in the namesake Indian city?
In a 1915 article J.H. Little attacked the only primary account of this event, that of John Zephaniah Holwell.  
Black Hole of Calcutta