Cabbage Salad

Two qts. finely chopped cabbage
2 level tablespoonfuls salt
2 level tablespoonfuls white sugar
1 heaping tablespoonful ground mustard

Rub yolks of 4 hard boiled eggs until smooth, add 1/2 cup butter, slightly warmed; mix thoroughly with the cabbage, and add a teacup good vinegar; serve with whites of the eggs sliced and placed on the salad.