Operating out of Armudstadt, the notorious city of corruption and deceit and centre of the Kingdom of Dernwich, the Duchampe Society takes its name from its founding father, one Vergrin Duchampe, who lived around the 18th century. Duchampe, an Elvish merchantman - or rather, a leader and “godfather” of a great deal of lower Elvish merchantmen, was notorious for his skill at wagers.
"Many strange things may be seen in the Great Swamps, not all real. But I tell you, there was a ship and it was real! Well it was old and all sails torn and had many holes in the hull... but anyway it was hundreds of miles from the Sea! How it came to be there, I can only wonder..."
(If it is not a hallucination, may be inhabited by wererats.)