Dutch Sauce for Fish.
Boil for five minutes, with a gill and a half of vinegar, a little scraped[265] horseradish; then strain it, and when it is cold add to it the yolks of two raw eggs, a quarter of a pound of fresh butter, a dessert spoonful of flour and water, and a little salt. Whisk the ingredients over a fire till the mixture almost boils, and serve it up directly to prevent it from curdling.