Butter 2 tb Bell pepper; chopped 2 tb Pimiento; chopped 9 tb Flour 1 1/2 ts Salt 1 ds White pepper 1 ds Paprika 3 c Milk 3 md Egg yolks; beaten 1 1/2 ts Dry mustard 1/2 c Capers 1 tb Worcestershire sauce 6 tb Mayonnaise 3 lb Crab