Think of classic detectives and you immediately think of Sherlock Holmes but this story, written in 1878, predated him by a good ten years and was even a best-seller back then, not an unknown work. Ms Green is considered the mother of the detective novel and is renowned for being legally accurate...
Not Ms. Green's best work, sadly. The pace is erratic and the tale often slows to a point where it struggles to hold interest in the reader. That doesn't hold true for much of her writing, so why it should do so here, I confess I don't understand; she can write far better than this when she tries...