[There's a short nod from Shun at that, and he reaches into one of his pockets to withdraw what appears to be a slightly dirty cleaning cloth. He has been assisting the staff on and off, but he didn't expect it to come in useful quite this way.

Carefully reaching down, he tucks the cloth around the edges of the disassembled charm, flips it over, and folds it tightly and neatly in. After inspecting his work to make sure it's not going to come undone easily, he picks the charm up again.]

I'll keep an eye out for any other letters like it in this building as well. I doubt it would be just the one thing out of place.