| Clue | Source | Date |
|---|---|---|
| Planners principally mark original papers | The Telegraph Toughie | 02 Sep 2025 |
| Cartographers | The Telegraph Quick | 06 Jul 2024 |
| Auto club employees | ||
| Auto club employees | ||
| Topographers | ||
| Rand McNally staff | ||
| Rand McNally staff | ||
| Cartography experts | ||
| Topographers | ||
| Cartographers | ||
| Cartographers. |