Locate the ancient outpost

The gnome we saved turned out to be a celebrity. He's none other than Jubilost Narthropple himself – a famous traveler and explorer, the author of three monographs, seventeen guidebooks, two cookbooks, several hundred scientific publications, and one romance novel (published under a pen name). Nowadays he's creating a map of the Stolen Lands – and he's sure that somewhere around here there's a long-lost dwarven outpost that trolls may have taken up residence in. It's high time someone recovered whatever's been lost there! Onwards – we've got some searching to do!