2 large oranges
3 large lemons
2 small grapefruit
12 cups sugar (6 lbs.)
water 
 

1. Wash fruit well
2. Place fruit in large pot (dutch oven, soup pot...)
3. Add 10 cups of water
4. Bring to boil, than reduce heat to simmer
5. Allow to simmer for about 2 hours, until fruit is tender and water has reduced to about half
6. Remove fruit from pot, let cool
7. Slice fruit into quarters
8. Remove seeds.
9. Scrape out pulp into the remaining water in pot
10. Cut rinds into slivers, and place back in pot
11. Add sugar
12. Set heat on Medium and stir until sugar is dissolved.
13. Bring to boil and cook until done
14. To test for doneness place a teaspoon of  marmalade onto a plate, let cool slightly. If a thin skin forms  it's done.
15. Remove pot from heat, allow to stand for 1 hour
16. Pour into sterilized jars and seal.

    
    Great served over sponge cake, ice cream, as well as toast!