With the make-up of the Black Swans being what it was, it wasn't uncommon for its members to find corpses in odd places. A duel conducted in secret, a slow-acting poison in a rival's cheesecake, or a long drop off of a conspicuous cliff, the methods were always clear though the culprit--more as a matter of intrigue, than a matter of necessity--was always a mystery.
Eventually a squad was formed whose sole duty was ensuring these bodies were removed, though its members were usually there as punishment. Dessert thieves, cowards, or simply the luck of being the daughter of a lesser noble family who'd drawn the ire of a daughter of a greater house. All were welcome in this elite group of groundskeepers.