The inspector went digging through three months of ink expenses in the copying room today. Anyone hunting for a crime that isn't there always starts by peering into someone else's inkstone.

• TogashiNot three months, six. The Doctor's arithmetic runs soft, so I merely counted on your behalf.
  MitsuhaWhile you're at it, count up your own expense claims from those six months too. My arithmetic's soft, so yours ought to balance it out nicely.
• ItsukiI use my ink sparingly. I really do.
  MitsuhaYour inkstone's the cleanest of anyone's. I can't tell if that's something to boast about or worry over.