"Ah, right," Matt nods, "that'd be a good plan." A little rueful, "The next people to stumble into them might not have time to find the right book."

Since there's no time like the present, he digs into his bag and comes up with a notebook and pen, flipping past a few pages of abstruse-looking diagrams and ancient languages to a fresh sheet.

He nudges the notebook Andrew's way.