[A raised eyebrow that Halsin can't see, but can probably tell is there from body language alone. He knows his progeny.]

You... don't discuss this often, is it something I should worry about? [Even as he asks, though, they reach the door to his lab. Time to change the subject.]

Don't touch anything. Don't breathe on the samples. Don't open the windows.

[The lab is an alchemist's haven, full of chemicals corrosive, abrasive, toxic, explosive, pervasive, and caustic. He's got notebooks and ink, as well. Though he's a bit more introverted than even most of his Court, Percy works hard. He finds a light toxin - designed to eat through plants, breaking down into harmless (to vampires and their ilk at the very least) component chemicals as it does so. His voice, when he speaks, is quiet. Less reverent or secretive, though, than trying to avoid breathing the noxious fumes. He's not wearing his mask.] This should do.