Preheat oven to 300ºF.
Combine dried pears, plums, and rum into a bowl and let soak overnight.
On the next day, boil the mixture in the water and orange juice until the mixture is thickened. Allow it to cool until it is luke-warm. Combine the yeast, flour, sugar, and spices in a bowl to prepare the dough. Add the luke-warm mixture and stir. Fold in the fruit and nuts.
Form four loaves of equal size from the dough. Cover and set aside to allow them to rise.
Place each loaf in a greased pan and bake for approximately 50 minutes.