| Clue | Source | Date |
|---|---|---|
| Unreasonable time spent for total messaging system in underground | ||
| Revolutionary closely looked to gather count's hiding place | The Telegraph Toughie | 04 Nov 2021 |
| Place where secret messages, etc, may be left | The Guardian Speedy | 09 Aug 2020 |
| Site for spy messages | Thomas Joseph | 07 Jul 2016 |