1 lb. softened butter
2 c. sugar
8 lg. eggs
4 c. flour
4 c. blueberries
4 tbsp. minced lemon rind

Preheat oven to 300 degrees. Lightly butter 2 loaf pans or tube pan. In large bowl cream butter and sugar until light and fluffy. Beat in eggs, one at a time. Gently fold in flour (save 3 tablespoons) 1/4 cup at a time. Toss blueberries, lemon rind and 3 tablespoons flour. Fold into batter. Pour in pans(2). Bake 1 hour plus 30 to 50 minutes. Cool completely. Unmold and let stand overnight before serving.