A real page turner

I loved this historical novel set in Edinburgh in 1822. Against the backdrop of the Botanical Garden moving to a new location on the edge of the city, mature trees and all, it is the story of the friendship of two women. Both outsiders in their own way, an impoverished widow taken in by wealthy relatives and a high class courtesan, they weave their way through a mystery, a romance and all embellished with loads of historical detail. Lovely!