Essence of Lily-of-the-Valley: Genre Undetermined

The small pot sat neglected at the back of the shelf for a long time, gathering dust, until one day a businesslike hand reached in, back past the honey and the black tea, and plucked it out. She blew on it to clear the dust, lowered her glasses to squint critically at the label on the pot, and then nodded. "Here it is," she said, turning to face the customer. "Essence of lily-of-the-valley. Now, do you swear that the manner in which you intend to use this will not harm the king's peace?" the customer looked blank. She sighed again, and explained, "Just say that you're not going to use this to kill somebody, would you? There are other customers waiting." There was only one other young woman in the shop, but--

Inspiration: The lily-of-the-valley growing in front of my house.
Story Potential: Low.
Notes: Meh.