Chop pineapple, raisins, and cherries.
Combine chopped fruit with currants, peel, and citron; soak in orange juice overnight.
Preheat oven to 275 degrees.
Place a small pan of water in the oven.
Line one 5 x 9 inch loaf pan and two 3 x 8 inch loaf pans with parchment or doubled waxed paper.
In a large bowl, cream butter and confectioner's sugar.
Stir in beaten egg yolks.
Stir in fruit, juice, and nuts.
Mix in sifted flour.
In a clean bowl, beat the egg whites to peaks.
Fold into batter.
Fill pans 2/3 full.
Bake for 2 to 2 1/2 hours until golden brown, or until toothpick comes out clean when inserted.