Russian Patties

1 pint oysters

3 tablespoons butter

4½ tablespoons flour

½ cup chicken stock

½ cup cream

½ tablespoon vinegar

¾ tablespoon lemon juice

Yolks 2 eggs

1 tablespoon grated horseradish

2 tablespoons capers

Salt and pepper

Parboil oysters, drain, and reserve liquor; there should be one-half cup. Make sauce of butter, flour, stock, oyster liquor, and cream; add yolks of eggs, seasonings, and salt and pepper to taste. Add oysters, and as soon as oysters are heated, fill patty shells.