Prompt from Michael JG Meathook: Labyrinth. Also, I'm so pleased PMs are working again!
"Don't even try it."
Holmes turned back to look at me.
"It's a labyrinth, Holmes. Even you wouldn't be able to get us through there safely."
"Do you have a better idea?" Holmes snapped, but I took no offence. I knew he was frustrated that our quarry seemed to be on the verge of escaping. We'd been tracking Harry Chambers for several days, and just when we were on the cusp of finding him, he had disappeared into the depths of the labyrinth.
"He may have no better idea of how to move through the labyrinth than we do," I suggested. "Perhaps we should simply wait him out."
Holmes shook his head. "If he did not know how to navigate the labyrinth, he would not have entered it. He must know the way through."
"For a labyrinth as impenetrable as this, there must be some way to indicate safe passage." I stepped closer, running my hands along the walls. Near the ground, so low I only noticed it because I had been searching, I found a rounded engraving, neat lines bound in a circle like a ball of string. One line was leading away, continuing deeper into the maze.
The sight struck an old memory, and I turned back to Holmes with a grin. "I know the way through the labyrinth. We simply follow the ball of string."