Prepare the grapes as for preserving, by removing the skins, boiling the pulp, and straining out the seeds. To seven pounds of fruit (weighed before the seeds are removed), add a cupful of strong vinegar, a cupful of grape-juice taken from the grapes used for preserves, two ounces of cinnamon, one ounce of cloves (tie the spices in a cloth so they can be removed), three and one half pounds of sugar. Boil until it becomes thick like a marmalade, which will take about an hour and a half. When done turn it into glasses. This is good with roast meats.