It's neck and neck as to whether this is my absolutely favourite Dorothy Whipple, or should it be Someone at a Distance? Anyway, this is DW at her finest.
Mr Knight is the seductive financier who comes into the lives of a very ordinary Midlands family after a chance encounter on a train. And gradually, his influence corrupts their goodness. Even Celia, the mother - content with her happy family and her modest house and garden and so less enthralled by the powerful Mr K - even Celia has a weak spot, because the big old country house (bought with tainted money) is so exactly the right milieu for her and she loves it. (As ever, DW can describe a house or a room so that you can feel the fabrics of the sofa or curtains, see the colours, smell the flowers!)
Drip, drip, drip, Mr Knight and his lucre eat away at family relationships, honesty, everything that is good, and there is a terrible tension as you see it all disintegrating.
A brilliant read. If this review doesn't do it justice, it's because I've been up until 3am unable to put it down!