Take 1 lb. cod or haddock ; put the head, bones, fins and skin into one cup cold water and let simmer. In one tablespoonful of dripping brown one small onion. Pare and slice two potatoes and parboil five minutes. Strain the fish bones from the water, add the potatoes, scrape in the browned onion, and add salt and pepper. Bring to a boil, then add the fish, cut into inch pieces ; simmer from ten to twenty minutes, or until the fish and potatoes are done. Take two tablespoonfuls each of flour and butter and one cup of milk, and cook together to make a white sauce ; add it to the chowder, boil, and add two crackers broken into quarter. Serve in a hot dish.