1. Skin the grapes, reserving the skins. Boil the pulp ten minutes, stirring often. Sieve to remove the seeds.
2. Seed the orange and grind it coarsely. Add with the juice to the grape pulp. Add the sugar, raisins and salt.
3. Boil the mixture rapidly, stirring constantly, until thickened, or ten minutes. Add the grape skins.
4. Boil ten minutes longer. Add the nuts and reheat to boiling. Pack in sterile hot jars and seal.