| Answer | Crossword Clue |
|---|---|
| LEWIS | Master of the coal, coal ground. |
| underclay | a stratum of clay lying beneath a coal bed, often containing the roots of coal plants |
| underclays | UNDERCLAY, a stratum of clay lying beneath a coal bed, often containing the roots of coal plants |
| LEWIS | Master of the coal industry. |
| seamed | thin layer in the ground, as of coal |
| seam | thin layer in the ground, as of coal |
| seams | thin layer in the ground, as of coal |
| seamer | thin layer in the ground, as of coal |
| seaming | thin layer in the ground, as of coal |
