In March 1905 Demon Veen (in VN’s novel Ada, 1969, Van’s and Ada’s father) perishes in a mysterious airplane disaster above the Pacific:
Furnished Space, l’espace meublé (known to us only as furnished and full even if its contents be ‘absence of substance’ — which seats the mind, too), is mostly watery so far as this globe is concerned. In that form it destroyed Lucette. Another variety, more or less atmospheric, but no less gravitational and loathsome, destroyed Demon.