Wash oranges, remove seeds and grind. Pit the plums and cut in
quarters. Combine the oranges and plums and add the sugar and raisins.
Simmer about 1-1/2 hours. Add the walnuts and cook about 45 minutes
longer. Pour into sterilized jars and seal.
Source: Pennsylvania Dutch Cook Book - Fine Old Recipes, Culinary
Arts Press, 1936.