Chicken and Lettuce à la Kendall recipe

Chicken and Lettuce à la Kendall. Put sufficient cold boiled chicken through the meat chopper to make a half pint (± 250 ml), make fine in a mortar or rub it in a bowl with the hard-boiled yolks of four eggs, four tablespoonfuls of thick cream, a half teaspoonful of salt, a dash of pepper, and if you have it, two saltspoonfuls of celery seed; in the winter you may add a half cupful of finely chopped celery. Butter thin slices of white bread, cover them with this mixture, place on top a slice of brown bread buttered on both sides, then a thick layer of shredded celery, with a tablespoonful of mayonnaise in the middle, then another slice of buttered white bread; press together, trim the crusts and cut into fingers.