Signed 1943. The note explains Guy Fawkes Day, on which the story begins sometime prior to WWII during which traditional celebrations were prohibited. Present in first U.S. edition per description by one online bookseller.
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| 1943 | Mary Poppins Opens the Door | Reynal & Hitchcock | Novel | ||
| April 1991 | Mary Poppins Opens the Door | Dell Yearling | Novel | ||
| October 2014 |
|
Mary Poppins: 80th Anniversary Collection | Houghton Mifflin Harcourt | Omnibus | 507 |