Louisa the Poisoner

'There are three things that grow in March Mire,' said the aunt, in a silly sing-song voice, her eyes half closed, 'and that grow nowhere else together, and seldom anywhere. Find them in one spot, take them and make them up. From them comes this dew. Oh Louisa. Listen carefully. This stuff grants the gift of death.'
Louisa widened her eyes but she was not actually impressed. Death was everywhere in the mire and especially often in her aunt's nasty bottles.
'Listen,' said the aunt again, 'the poison in this bottle leaves no trace as it kills. In the world beyond the mire this can mean much. I've told you, there are towns along the moors, and great houses piled up with money and jewels. If every cobweb on that ceiling was changed to bank notes it would be nothing to them ... We'll seek for just such a rich place. Then I'll know how to go on. You shall pretend to be a lost lady, as I've trained you. You'll do as I say, and our fortunes will be made.'
'But how, Aunt?'
'They'll fall in love, and make over their goods through wills, which I've told you of. And then I'll see them off ...'
Thus begins Louisa's strange journey into the world beyond the mire, armed only with her striking beauty, her perfect manners, and her aunt's deadly poison. A thrilling historical fantasy!