Prepare potatoes and potato water. Sprinkle yeast into very warm potato water. (crumble compressed yeast into very warm potato water). Stir until dissolved. Add mashed potatoes, 2 tablespoons sugar and 1 cup of the flour. Beat smooth. Cover and let rise until bubbly. (about 1/2 hour). Stir down. Add 6 tablespoons sugar, 1 teaspoon salt and 1 cup of the flour. Beatsmooth. Stir eggs, then cooled melted shortening. Add raisins. Stir in 1 1/2 cups more flour. Sprinkle about 1/2 cup flour on board. Turn dough out on flour. Kneed until smooth (5to 7 minutes), adding any remaining flour as needed. Shape into a ball. Place in lightly greased bowl cover and let rise (about ! hour). Punch down. Divide dough into 4 equal parts.Let rest 5 minutes. Shape each part into slender loaf about 1 1/2 inches in diameter. Put 2 loaves side by side into greased loaf pan. 4/3/4 x 3/4 inches. Let rise until doubled in size (about 1 hour). Bake in moderate oven(350 degrees). 1 hour.