| Clue | Source | Date |
|---|---|---|
| RCS visited by the Head of the 13? | The Telegraph Toughie | 27 Aug 2021 |
| Once-plentiful endangered fish nicknamed 'Albany beef' | New York Times | 15 Apr 2021 |
| Large fish valued for their roe | Irish Times Simplex | 13 Apr 2019 |
| Sources of caviar and isinglass |