Angela's Christmas Adventure by Clara Benson

Angela's Christmas Adventure contains spoilers from the Angela Marchmont Mysteries, and so is best enjoyed as a sequel to the series.
Angela Marchmont is looking forward to spending a nice, cosy Christmas à deux in Saratoga Springs, but before she can set off she finds herself caught up in the search for her elderly neighbour's missing diamond ring. Can Angela find it and help a young couple celebrate their own happy Christmas?
This is a short story of ten thousand words, or seven chapters-just right for an afternoon curled up on the sofa!