Potato and Herring Salad

Cut in three-eighths of an inch squares, four pounds of potatoes cooked in salted water, half a pound of sour apples cut in four, peeled and minced, eight medium-sized vinegar pickles also minced, and four salted herrings boned and cut in three-eighths inch dice, previously unsalted in cold water. Put the potatoes into a bowl, season them with salt, pepper, oil and vinegar, and when the seasoning is well mixed add the apples, pickles and herrings, a tablespoonful of finely chopped onion, and four spoonfuls of pickled beetroot cut in quarter-inch squares; mix all the ingredients thoroughly, then range the salad on a dish or in a salad bowl.