An artificially intelligent submarine left over from a human war becomes aware of an invading alien spaceship concealed on the sea bottom.
First published in the magazine Scientific American, January 1963.
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| July 1963 |
|
Gamma, 1 | Star Press, Inc. | MAGAZINE | 39 |
| October 1968 |
|
The Far-Out Worlds of A. E. van Vogt | Ace Books | Collection | 136 |
| April 1973 |
|
The Far-Out Worlds of A. E. van Vogt | Sidgwick & Jackson | Collection | 136 |
| January 1974 |
|
The Worlds of A. E. van Vogt | Ace Books | Collection | 136 |
| February 1974 |
|
The Far-Out Worlds of A. E. van Vogt | New English Library | Collection | 135 |
| October 1974 |
|
The Worlds of A. E. van Vogt | Ace Books | Collection | 136 |
| May 1975 |
|
The Far-Out Worlds of A. E. van Vogt | New English Library | Collection | 135 |
| August 1975 | Science Fiction Special (15) | Sidgwick & Jackson | Omnibus | ||
| June 1986 |
|
101 Science Fiction Stories | Avenel Books | Anthology | 305 |
| 1992 |
|
The Giant Book of Science Fiction Stories | Magpie Books | Anthology | 305 |
| September 1996 |
|
100 Astounding Little Alien Stories | Barnes & Noble Books | Anthology | 261 |
| April 1997 |
|
Ackermanthology: 65 Astonishing, Rediscovered Sci-Fi Shorts | General Publishing Group | Anthology | 271 |
| September 2000 |
|
Ackermanthology: 65 Astonishing Rediscovered Sci-Fi Shorts, Millennium Edition | Sense of Wonder Press | Anthology | 271 |