—BLACKBERRY VINEGAR— 1/2 cup blackberries 1 cup vinegar, white —CHICKEN— 2 each chickens, halved 6 oz vinegar, blackberry 12 oz demi-glace 6 oz butter —DEMIGLACE— 5 pound beef, bones 5 pound chicken, bones 1/2 each celery, bunch 1 each carrot, medium 2 each onions, medium 1 each bay leaf 4 each garlic, cloves 1 each