First published in the Pall Mall Gazette, April 2, 1894.
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| 1975 |
|
Early Writings in Science and Science Fiction | University of California Press | Collection | 32 |
| July 1997 | Futurist, #5 | Diverse Enterprises | MAGAZINE | 53 |