Boil raisin, first amount water, and juice, for 5 min in a covered pot. Combine the following: brown sugar, cornstarch, cinnamon, orange rind, salt (dissolved in second amount of water). Add to cooked raisins. Bring to boil, stirring. Remove from heat. Add vinegar and butter. Pour into unbaked pie shell. Top with other pastry. Bake in hot oven (425 F) for 25 min or until done.