I had a good time with this. The setting was very atmospheric and I enjoyed the characters - especially Louis and Margaret's relationship as they became closer. Unfortunately, there were a couple of things that rubbed me the wrong way in the end, mostly to do with the way the story wrapped up: 

Margaret and Paul formed quite a bond at Hartwood Hall; Paul was attentive, sweet, helpful, loved his job despite the hardships, and was open to the fact that his employer was with a woman - in the 1800s (and now..) a man like this is a keeper. In the end though, Margaret threw him to the side and determined she 'wasn't really in love' with him after the miscarriage, and left him all alone after deciding to run away with her employers. Within the span of a day, Paul lost someone he loved, a child he didn't know he could have, his job, AND his home. I can't help but feel terribly for him and feel that Margaret was too cold with him.

The ending and big reveal felt a little rushed in the end. I am looking forward to reading another of Lumsden's book in the future because the writing overall is quite good.