| Clue | Source | Date |
|---|---|---|
| Devon-born pioneer of the steam engine | The Times Specialist | 16 Dec 2024 |
| Thomas, English engineer born in 1663 who developed a steam engine (8) | ||
| Thomas --, English engineer who invented a steam engine, later modified and developed by James Watt | The Telegraph General Knowledge | 07 Oct 2019 |
| Watt in exhibition centre by sign: 'Steam Engine Inventor' | The Telegraph Toughie | 02 Feb 2018 |