While the duck is baking, measure 1 cup of water plus the other pickling ingredients, except the raisins, and add to a medium sauce pan. Bring the mixture to a boil, then reduce heat and stir until the sugar has totally melted. Mix in the raisins and remove from heat, cover with a lid, and allow to stand for at least one hour. This can be made several days in advance and stored in the refrigerator.