The Fortieth Door.

Mary (Wilhelmina) (nee) Hastings Bradley (1882- 1976) was an American writer. Her story The Life of the Party appeared in The O. Henry Prize Stories anthology. She published over twenty books including mysteries and travel writing. She is also noted as the mother of science-fiction author James Tiptree, Jr (real name Alice B. Sheldon) and she wrote a book referring to her titled Alice in Jungleland. Amongst her other works are: The Favour of Kings (1912), The Palace of Darkened Windows (1914), The Fortieth Door (1920), The Innocent Adventuress (1921), The Road of Desperation (1932), Old Chicago: The Fort (1933), Pattern of Three (1937), Murder in the Family (1951) and Nice People Poison (1952).