Sandwiches a la Rorer

Chop sufficient white meat of cooked chicken to make a half pint. Select two fine bunches of cress, and with a sharp knife shave it very fine. Wash and dry the crisp portion from a head of lettuce. Put the yolks of two eggs into a saucepan, add the juice from two lemons and stir over hot water until the mixture is thick; take from the fire and add slowly two tablespoonfuls of olive oil; add this to the chicken and season with a half teaspoonful of salt and a dash of pepper. Butter a slice of white bread, put over a rather thick layer of the chicken mixture, then a slice of brown bread, buttered on both sides; cover this with a thick layer of cress, dust it lightly with salt and pepper, then another slice of white bread, buttered; press these firmly together, trim the crusts and cut into fingers.