Partly thaw the frozen peaches and cut into small pieces. Soak the pieces overnight in the juice adding the bitters and brandy. Keep fresh peaches immersed or covered to prevent darkening. Partially thaw the orange sherbet. Mix the sherbet and the peaches. Spoon into parfait glasses and freeze for two to three hours. NOTE: To serve with Oriental food, mince 1 T crystallized ginger and add to the peaches.