Green Tomato Pickles

Slice 7 lbs. tomatoes and cover with 3 C Mrs. Lee's pickling rind to 2 gal. water. Soak 24 hours. Drain, rinse well. Soak 4 hours in fresh ice water, changing water every hour. Make syrup of 4 lbs. sugar, 2 qts. vinegar. 6 t plain salt and 1 stick cinnamon. Pour over tomatoes. Let stand overnight. Boil 1 hour, pack in jars and seal. Green food color may be added for brighter green color if desired.