As I was browsing through WikiTree not long ago, I noticed that one of my favorite British Golden Age detective novelists didn't have a profile. So I remedied that, and added her parents and her husband. I have a paid subscription to Ancestry and thought I would create a tree there and dig around for her relations. I found dozens, and I only went back a few generations. I'm not expert at sourcing and filling out biographies, so my work on WikiTree is slow and painstaking. Also, I'm not familiar with English sources. It will take me a hundred years to add Margery's family.
If anyone would be willing to help I would be most grateful. I can give you access to the tree I started on Ancestry, with the caveat that I was nearly drowned in the deluge of uncles, aunts and cousins so I'm not fully confident of what I have. Also, her parents were cousins, which always makes my head spin.