©National Archives

'Jack the Ripper' Letter and Postcard, September-October 1888 The murders committed by 'Jack the Ripper' remain a great unsolved mystery, and are an enduring source of fascination. Little is known except that between the months of August and November 1888, six prostitutes were found murdered within a one mile square area of London's East End.

Despite police investigations the killer was never caught. This letter and postcard, claiming to have been written by 'Jack the Ripper', were originally sent to the Central News Agency before being forwarded to Scotland Yard.

The Metropolitan Police published facsimiles of these documents. The result was a flood of similar letters from a number of hoaxers all claiming to be the killer.