Depending on the account you read, the Black of Hole of Calcutta was either:

• A miserable little hole into which mean Hindus shoved 146 innocent English, Dutch, and Portuguese prisoners one hot summer night in 1756. A hole so cramped with people that by morning only 23 had survived; or...

• A miserable hoax invented by mean British imperialists to justify a crackdown on poor, innocent Hindus then in rebellion against British/Muslim tyrants.

And which view is correct? I haven't any idea.