Mary Kennedy Core, The Khaki Kook Book
“ Curry, as usually made in India, is not made with curry powder at all. Every Indian cook-house is provided with a smooth black stone about a foot and a half long and a foot wide. There is also a small stone roller. On this large stone, by means of the small stone, daily are crushed or ground the spices used in making curry. The usual ingredients are coriander seeds and leaves, dried hot chilies or peppers, caraway seeds, turmeric, onions, garlic, green ginger, and black pepper grains. ”
