Marrow Ginger

8 pounds vegetable marrow, 6 pounds sugar, 2 dessertspoonfuls of ground ginger, a quarter pound of preserved ginger, 3 lemons, half a teaspoonful of cayenne. Let marrow and sugar stand for 20 hours, and then boil until the syrup thickens like honey. The best marrows are the young ones. You should be able to press the thumb nail into the skin.