Mock Terrapin Soup

3 pounds lean beef
1 pint milk
1 Tablespoon flour
½ teaspoon mace
½ teaspoon dry mustard
1 ½ quarts water
1 stick butter
1 cup cream
salt and pepper to taste

1. Boil the meat and water until reduced by a third. 
2. Add the milk and butter.
3. Remove the meat and grind or chop fine.  Return to stock.
4. Simmer for 5 minutes more.  Add flour dissolved in cream and seasonings.  Cook until thickened.  Serves 8.