Describing his enforced twelve-year-long separation with Ada, Van Veen (the narrator and main character in VN’s novel Ada, 1969) mentions numbers and three elements (fire, water, and air) that destroyed, in that sequence, Marina (Van's, Ada's and Lucette's mother), Lucette (Van's and Ada's half-sister) and Demon (Van's and Ada's father):
He traveled, he studied, he taught.