This section is from the book "Practical Cooking And Serving", by Janet McKenzie Hill. Also available from Amazon: Practical Cooking and Serving: A Complete Manual of How to Select, Prepare, and Serve Food [1919].
2 cups of flour. 1/2 cup of shortening. 1/2 teaspoonful of salt. 1 cup of cold mashed potatoes. 2 teaspoonfuls of baking-powder. Milk as needed.
Sift together the flour, salt, and baking powder; with the tips of the fingers, or a knife, work in the shortening, then the mashed potato; add milk to make a soft dough; turn on to a floured board, handle as little as possible, pat and roll out to fit the top of a dish filled with cooked meat, prepared for a meat pie. If desired the dish may be lined with the pastry and brushed over with the white of egg before the meat is put in place. Roll the pastry about one fourth or three eighths an inch thick.
 
Continue to: