| Clue | Source | Date |
|---|---|---|
| Hollow stem of a grass | ||
| River in Somerset and Devon | The Chronicle of Higher Education | 12 Jun 2015 |
| River in Somerset and Devon | ||
| Coal dust | ||
| Grass stem | ||
| Coal dust | ||
| Refuse coal screenings | ||
| Slack | ||
| Coal refuse. | ||
| Coal dust. | ||
| Jointed stem of a grass. | ||
| Hollow, jointed stem of a grass. | ||
| Hard coal refuse. |