At the beginning of VN's story Time and Ebb (1944) the narrator mentions his dear friends Norman and Nura Stone:
In the first floriferous days of convalescence after a severe illness, which nobody, least of all the patient himself, expected a ninety-year-old organism to survive, I was admonished by my dear friends Norman and Nura Stone to prolong the lull in my scientific studies and relax in the midst of some innocent occupation such as brazzle or solitaire.