Mayonnaise Sauce
For half a pint of mayonnaise sauce put one raw yolk
of egg into a basin, a saltspoonful of English and same of
French mustard, a pinch of salt and white pepper, and a
tiny dust of Marshall's Coralline Pepper. Mix this with
a wooden spoon with salad oil, just dropping the oil in
carefully, drop by drop; when this is as thick as butter,
add a teaspoonful of tarragon vinegar, four or five drops
of chilli vinegar, and eight drops of lemon juice. This
sauce should be kept quite stiff.