The Mudded Manse (5E)

From publisher blurb: Hidden in the dismal, swampy depths of the Salt Mire, the Mudded Manse is a well-kept secret among the wealthy and powerful, who travel here to rest and receive treatments for various afflictions. Built around a pit of bubbling mud, reputed to have miraculous cure-all powers, the secluded manse is well worth the trouble of a visit if one is afflicted with a terrible disease. Thanks to the powerful clientele frequenting the manse, a secondary trade in political information has developed, as the comfortable atmosphere encourages visitors to loosen their tongues.