Guild of Embalmers and Allied Trades
Presumably the Disc's trade organisation for embalmers, funeral directors, undertakers, gravediggers and all those unsung performers of the seventh work of mercy. There is, or was, a Djelibeybian branch, called the Natron Lodge: Dil the master embalmer is not only a member but holds the rank of Keeper of the Left-Hand Door.
Whether Dil is still a member after transferring his trade skills to the stuffing of olives, and incidentally inventing the pimento-stuffed cocktail olive, is yet to be revealed.