A crew of nine lands on Saturn's moon, Dione, to mine a precious pearl-like stone that promotes telepathic ability, called "thought-nuggets." Previous expositions have all proved fatal. The crew hopes they will fair better on this moon of delirium.
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| January 1940 |
|
Astounding Science-Fiction, January 1940 | Street & Smith Publications, Inc. | MAGAZINE | 30 |
| January 1940 |
|
Astounding Science-Fiction, January 1940 | Atlas Publishing and Distribution Co. Ltd | MAGAZINE | 20 |
| April 1951 |
|
Possible Worlds of Science Fiction | Vanguard Press | Anthology | 113 |
| June 1952 |
|
Possible Worlds of Science Fiction | Grayson & Grayson | Anthology |