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| J.M. Walsh: Science Fiction Technology and Ideas |
| James Morgan Walsh (b. 1897 - d. 1952) was an Australian-born writer, in the UK from 1925. He was active as an author of short fiction from 1913, beginning to publish novels from 1921; he wrote some of his sf as by H Haverstock Hill. |
| Invention/Technology | Source Work (Publication Date) |
|
Antigravity - first use |
The Vanguard of Neptune (1932) |
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