| Clue | Source | Date |
|---|---|---|
| Henry wears tight nose peg in lethal gas | The Times Cryptic | 11 Feb 2026 |
| Poisonous gas used in the First World War | The Times Specialist Sunday | 09 Jun 2019 |
| Poisonous gas | The Telegraph Quick | 03 May 2019 |
| Poisonous gas | The Times Concise | 22 Nov 2017 |
| Gas used in making glass and plastics | ||
| Gas used in W. W. I |