A large box arrives, escorted by a half dozen burly guards.
It’s the payment for the drawings.
open the box, 6 bags, 3k gp of platinum in each, and each bag has 4x 500 gp diamonds
there’s a note "the info we were able to copy from the obelisk was incomplete, but we did get the most important parts of it, that’s where the bonus came from.
The Goblin Grinders of Varisia
0113 Payment from Heidmarchs