Wash 4 to 5 oranges thoroughly
Peel the oranges, keeping the peel
Remove the white pith from the peel
Slice the peel into thin strips
Remove seeds and set them aside
Chop the orange flesh
Place peel, flesh, seeds, and any juice in a pot
Add 4 cups of water
Let the mixture soak overnight or for several hours
Bring the mixture to a boil
Reduce heat and simmer until the peel is soft
Remove the seeds in a tied cheesecloth or strainer
Add 4 to 5 cups of sugar
Stir until the sugar dissolves
Boil the mixture until it reaches setting point
Test the marmalade on a chilled plate
Skim off any foam from the surface
Pour the hot marmalade into sterilized jars
Seal the jars while hot
Let the jars cool completely