| Clue | Source | Date |
|---|---|---|
| Mine tram (2 wds.) | ||
| Fuel-toting trailer for Gordon, Emily, or James, in the world of Thomas the Tank Engine | ||
| One might be behind a steam locomotive | Wall Street Journal | 24 Aug 2022 |
| Model train component | Newsday | 23 Aug 2019 |
| Locomotive follower | Thomas Joseph | 30 Jun 2017 |
| Mine craft? | New York Times | 16 Oct 2016 |
| Tender | Wall Street Journal | 17 Sep 2016 |
| Mine craft? | ||
| Certain railroad unit | ||
| Freight train unit | ||
| Freight train unit |