Remove pulp from four large grape fruits, and drain. Add an equal quantity of finely cut celery, and apple cut in small pieces. Moisten with Mayonnaise, pile on a shallow salad dish, arrange around a border of lettuce leaves, and mask with Mayonnaise. Outline, Using green Mayonnaise, four oblongs to represent playing cards, and denote spots on cards by canned pimentoes or truffles; pimentoes cut in shapes of hearts and diamonds, truffles cut in shapes of spades and clubs. Garnish with cold cooked carrot and turnip, shaped with a small round cutter to suggest gold and silver coin.