D10 Reasons informant knows about secret entrance to the dungeon

D10 REASONS INFORMANT KNOWS ABOUT SECRET ENTRANCE TO DUNGEON

1. Used to play there as a child
2. Did some work connected to the place. Discovered by accident.
3. Heard about it from adventurers who never came back
4. That's how they lost their arm.
5. It's a family secret told from parent to child. Ancestor had some involvement in the building of the dungeon.
6. An apparition imparted the knowledge
7. They dreamed of it, then later checked and found it true.
8. What? Everyone in town knows this! Did no one else tell you?
9. Claims to be clairvoyant. Charges 1d6 GP for the information.
10. Local explorer – likes to roam about. Happened upon secret under exploration run. Not keen on going back, though will offer services as wilderness guide if asked.