Marian had followed the clues to a hole in the ground.
Someone had hastily scrawled a map down on a piece of parchment. It was jammed in an old book on Greek conquests and lost to the world.
Marian had found it while wondering the library; one of the few places she could safely travel while recovering from her illness.
She tossed a rock into the hole. It was pretty deep, but she had enough rope. She lowered herself into the cavern, moving her light around to glimpse anything. For a while, she saw nothing.
Then, it appeared. An ancient ship rose from the darkness. It startled her, causing her to drop her touch. It clattered to the deck of the ship.
Slowly, she descended to the deck. Staying tethered to her rope, she felt around carefully until she reached her light.
Marian raised the light again and marvelled at how well the ship looked for its age.