NITRE
| Date | Clue |
|---|---|
| 2014-11-21 | Fertiliser ingredient |
| 2014-10-14 | Saltpetre |
| 2013-03-24 | KNO3, in Britain |
| 2004-10-15 | Saltpetre |
| 2003-12-07 | Saltpeter, to a Brit |
| 1999-07-06 | Saltpetre |
| 1998-07-13 | Saltpeter: Brit. |
| 1997-02-03 | British fertilizer |
| 1996-04-09 | Saltpeter, in Salisbury |
| 1994-05-24 | Potassium salt |
| 1994-04-21 | KN03 |