This section of the book is from the "Household Companion: The Model CookBook" book
Sift together three cups of pastry flour, one teaspoonful of salt, and six level teaspoon fuls of baking-powder; with the tips of the fingers, well floured, work in one-third a cup of butter and mix with about one cup and-a-half of milk and water to a soft dough; spread in two buttered pans, smoothing the dough with a knife or spoon. When baked, butter the under crust, and put together with two baskets of blackberries that have been standing mixed with granulated sugar for some time. Sprinkle the berries on top of the cake with powdered sugar. The berries between the cakes and a part of those on top may be mashed if desired.