One of London's forgotten true stories involves an escaped tiger snatching a boy from the streets of the East End.
The tiger belonged to Charles Jamrach, a 19th century importer of exotic and wild animals, who stepped in to save the boy's life.
The event is commemorated with a statue in Wapping's Tobacco Dock.
Now the tale has also inspired a novel by author Carol Birch, set within the teeming, multi-national world of London's docks during the Victorian era.
Our correspondent Brenda Emmanus has been delving into the past.