India Black's double life operating a high-class brothel and running high-stakes espionage for Her Majesty's government can take its toll. But there's no rest for the weary - particularly when an international conspiracy comes knocking. India Black is one of Victorian London's most respected madams - not a bloody postmistress. So when Colonel Francis Mayhew forwards a seemingly innocuous shipping bill to her address, she's puzzled. And when three thugs bust down her door, steal the envelope, a