One tends to think of gangs as a mostly male endeavor, and this is and always has been pretty much true. But the greatest girl gang in history outdid most of the male gangs, not only in London, but anywhere.
Possibly beginning in the late 1700's, an all-female syndicate known as the Forty Elephants started their well-planned crime spree. The Forty Elephants used clever thievery to wreak havoc on the local economies. They were called the Forty Elephants because they operated from the Elephant and Castle district of London.