Trim dark green and pink parts of rind; cut rind in 1-inch cubes, Soak overnight in salt water-1/4 c. salt to 1 qt. water; drain ;rinse and cover with cold water.
Cook just tender; drain. Combine sugar, vinegar, water, lemon and spices tied in a bag. Simmer 10 minutes. Remove spice bag; add watermelon pieces. Simmer until clear. Fill hot, sterilized jars to 1/2 inch from top. Seal.
boiling water bath for 15 minutes
NOTE: Instead of 4 c. sugar I used: 1 1/4c. corn syrup and 2 3/4 c.sugar