Just a snap. They were hidden in the dirt.

[ Yes, yes, he knows that look of exasperation very well. But nothing bad happened!

Resting his spoon, he brings out the items he planned to have Rei 'read'. Two diaries - one bound with twine; the other badly damaged - and a hand mirror. He taps the damaged diary. ]

This one was in that room. Whoever lives there wanted to hide what they found I guess.