[Aw, man, Tadashi knew he'd neglected to do something...]

Oh, Professor, I forgot to call you! I found him a few days ago, but I was so preoccupied- [You know, with making sure his little brother was healthy and whole and arranging to work in exchange for the room, plus those weird mood swings Hiro's been having...]

I'm sorry I didn't tell you sooner. We're both staying at the Midnight Hotel now.