Combine fruits and nuts in a large bowl. Pour brandy over and cover bowl tightly. Let mixture stand overnight or up to 48 hours.
Let butter and eggs come to room temperature. Beat butter until light and creamy. Beat in brown sugar until mixture is light and fluffy. Beat in eggs a few at a time, beating well after each addition. Beat until well blended.
Sift together the dry ingredients. Stir lemon and orange juices into the creamed mixture, then stir in dry ingredients.
Transfer batter to a very large pot or bowl, large enough to hold batter and all fruits and nuts. With a long-handled wooden spoon, stir in fruit and nut mixture, along with the brandy which has not been absorbed. You might have to use your clean hands for this mixture. Blend thoroughly.
Grease 2 loaf pans and 2 tube pans (or use more loaf pans). Line pans with waxed paper then grease the paper.
Turn batter into pans and bake at 250° for about 4 hours for loaf pans and 6 hours for tube pans.
These cakes are difficult to test because the fruit is so dense, so try to test in areas where there is more cake than fruit.A toothpick or cake tester should come out clean when inserted in cake.
Cool cakes in pans on racks. When cool, carefully peel off paper. Wrap cakes in cheesecloth and sprinkle generously with more of the brandy. Seal cakes in food storage bags or plastic wrap.
Brush cakes once a week with more brandy and reseal. These fruitcakes should be left to mellow for at least 4 weeks, and can then be frozen after that amount of time.