Lettuce Salad, Plain

Choose freshly gathered and well-filled lettuce heads, suppress the hard leaves, keeping only the yellow ones; pick them off the stalks, retaining the heart whole, the size of an egg, and cut it in four. Split each leaf through the center, wash them at once, drain, wipe and shake the salad well to extract all the water, then place it in a salad bowl, sprinkling over some chopped chervil and tarragon. Put into a bottle four egg-yolks, two spoonfuls of vinegar and eight of oil, some salt and pepper; shake the seasoning up well in the bottle, and pour it over the lettuce, stirring it until it is properly mixed.