As it happens the only Persephone in my TBR nightstand was The Mystery of Mrs. Blencarrow by Mrs. Oliphant. It is coupled with another story Queen Eleanor and Fair Rosamund.
I enjoyed both stories, but as I am still feeling unbloggy, I am going to let others speak for me. A rare occurrence indeed. (I will say that I caught the Brown reference in the Mrs. Blencarrow almost immediately.)