From: The Thorough Good Cook

Sauces: 39. Mayonnaise

Take a round-bottomed basin, place therein three yolks of eggs, a little pepper and salt, and with a wooden spoon proceed to work therein, by turning the spoon round quickly, about half a pint of salad oil and half a gill of tarragon vinegar; these must be incorporated by degrees, almost drop by drop; and in order to produce the sauce in perfection, it must present the appearance of a firm, creamy substance. This cold sauce is especially adapted for chicken and lobster salads.