SAUCE MAÎTRE D'HÔTEL
Every one likes this sauce for either meat or fish. In a double saucepan melt a lump of butter, flavor it with salt, pepper, some minced parsley that you had first rubbed on a raw slice of onion, and some lemon-juice. Use vinegar instead of the lemon if you wish, but do not forget that it does not require so much vinegar. Mix it with a fork and serve it warm; do not let it bubble.
SAUCE AU DIABLE
(For cold meats)
Take a shallot or two, according to quantity of sauce needed, slice very finely, shred a little parsley, put both into the sauce-boat, with salt, pepper, and mustard to taste; add oil and vinegar in proportion of one dessert-spoonful of vinegar to two table-spoonfuls of oil, till sufficient quantity.