A beanpole of a man with a calculating gaze greets you from behind a table full of strange vials and mining equipment. Behind him, various mining and adventuring gear is displayed. He's rumored to have a guide to not dying in Drakkenheim.
Gainsbury is especially well stocked on mining and prospecting equipment, and sells a pamphlet detailing the correct methods for safely handling and extracting delerium crystals. A copy costs 1 gp. The information inside is filled with hyperbolic (but correct) warnings. The instructions are overly detailed and rather long-winded, but reasonably accurate.