In a large bowl mix the yeast with the teaspoon of sugar and ¼ cup of the milk. Set aside to proof.
In another bowl mix 3 cups of the flour, salt, and spices together. Blend in the butter with your fingertips, then blend in the sugar.
When the yeast mixture has begun to bubble, stir in the remaining ¾ cup milk and beat in the eggs. Add the flour mixture and mix well with a wooden spoon. Add enough additional flour to form a ball of dough and knead in the bowl, adding additional flour as necessary, until pliable but fairly firm.
Knead in the raisins, currants, and lemon rind. Cover the bowl with a clean towel and set aside in a warm place until the dough has doubled in size.
Line a 10-inch round baking pan with wax paper. Punch down the dough and transfer it to the pan. Cover and allow to rise for 30 minutes.
Preheat oven to 350℉. Bake the cake for 1 hour, until browned. Turn out onto a wire rack and allow to cool completely.