"-That's enough."
A calm voice called out.
I wasn't able to turn around. But with my enhanced senses, I could tell my master had
placed a large object on the ground beside him.
(-that was, Touko Aozaki's...!)
The bag, from when I first felt the presence of this monster.
It appeared my master had found the bag while we had been fighting. Probably, when
Touko had died, the spell concealing it had broken.

The Case Files of Lord El-Melloi II, Volume 3, Chapter 3, Part 5