Most Dangerous Woman

''It was said that she had the good manners of a respectable upper servant but was far too young to have been pensioned; that she spoke as if she had received an education, but knew the costers'' slang as if she were born-and-bred to it; and that she not only had no husband - which was a commonplace on Leather Lane - but seemed never to have possessed one.''

When the mysterious Sarah Tanner opens h...