Merlina the raven is missing. Legend says that unless six ravens are kept at the Tower of London at all times, the kingdom of Britain will fall The Tower of London’s famous 'Queen' raven has been missing for several weeks and is now feared dead. In a statement on Twitter, Tower of London staff said Merlina's continued absence indicated she may have sadly passed away. Merlina, who joined the tower’s flock in 2007, was the "ruler of the roost" and will be missed, the statement said. Legend says that unless six ravens are kept at the Tower of London at...