Grape catsup

Wash tart grapes, remove the stems and put the fruit into a kettle, with just enough water to prevent scorching. Stir often with a wooden spoon and cook until tender. Rub, a little at a time, through a fine colander. Reject the seeds and skins, and measure the pulp. To each quart and a pint of this add a pound of brown sugar, a cupful of white vinegar, a heaping teaspoonful, each, of ground cinnamon, allspice, mace, salt and white pepper, and a half teaspoonful of ground cloves. Boil long and steadily until the catsup is reduced to less than half the original quantity, and very thick. When cold, bottle, cork tightly and cover the corks with sealing wax.