Hermione furrowed her brow and listened with great intent, biting back a smile at the fact that he reminded her of-- well, herself-- deep in thought, needing to verbalize every cognition so she wouldn't forget a step.

"It's a clever potion- I've never heard of anything so covertly deadly that's colourless and odorless. Perhaps you'd have more luck if you ask the Aurors for the cup of soup? I'm sure they're keeping it for testing purposes. Ron and Harry would definitely get you in there to test a sample, if you'd like to..."