My understanding is that Clemence Dane was very well-respected in her day, even if she has (rightly) fallen out of fashion now, so it's odd that there is no biography: I'm sure there would be plenty of material! How terrible, to decide that women who are unmarried due to the Great War are "surplus" and that companionship among women is bad -- especially when you yourself are Sapphically inclined. She must have been a very strange person!