Squeeze juice from fruit. Grind peels and pulp in food
processor. {Or slice peels thinly by hand}
To the mixture of fruit and pulp add 3 cups of water for every cup
of fruit
Limes are very strong and not very juicy.
Bring these ingredients to a boil in a non-reactive pan;
boil until the mixture is tender and reduced by half.
For each cup of this mixture, add 3/4 cup sugar.
Stir until all the sugar is dissolved and mixture reaches a rolling
boil.
Reduce heat somewhat, keeping mixture boiling.
Stir occasionally. Test after 25 minutes.
Ladle into preheated, sterilized jars and cover marmalade with
melted paraffin wax to seal.