You walk along the right-hand passageway ior a long clisiance, praying that you can find a iunnei that wiil lead to your own time. You choose one ai the n:any tunnels you see and follow it. Instead oi rising to the surface, you enter a brightly-lighted chamber, in the center of which is a bearded, oiC man seateci in a chair.

"Welcome," he says, as if he has been expecting you. "Thank you," you reply. "Can you help me firnd my way back to my own time?"

The old man smiles. "First of all," he says, "tell me why you want to return to your own time instead of another time."