Damson Jelly - cooking recipe

Ingredients

5 lb. damsons (very ripe)
water
7 1/2 c. sugar
1/2 tsp. margarine
1 box pectin (Sure-Jell)

Preparation

Place damsons in saucepan with 1 1/2 cups water.
Bring to boil and simmer for 10 minutes.
Run through sieve and add water to make 5 1/2 cups juice.
Place juice in 8-quart pot with margarine and pectin; bring to a full, rolling boil, stirring constantly. Quickly add sugar and bring back to a full, rolling boil.
Boil for 1 minute, stirring constantly.