Cream together 1-1/2 cups of light brown sugar, 1/2 cup of lard and butter, mixed, and the yolk of one egg. Add 1/2 cup of hot water and 3/4 teaspoonful of saleratus (baking soda) dissolved in a little boiling water; add 2-1/2 cups of oatmeal the stiffly beaten white of egg and 2-1/2 cups of white flour. Mix all together. Dredge the bake board with flour, roll thin. Cut out with a small round cake cutter. Sift a little flour over the well-greased baking sheets, on which place cakes and bake in a moderately hot oven.