The Surveyor's Secret Cache

Deep within the dungeon's forgotten masonry wing, the party discovers a loose flagstone that reveals a hidden compartment. This stash was clearly prepared by an expedition leader, containing several gemstones used for currency, essential magical scrolls for area denial, and unique surveying equipment intended for mapping the deeper reaches of the complex. The items are remarkably well-preserved, shielded from the damp dungeon air by a lead-lined container.