Fry an onion in butter with some bits of cut-up ham, then pour a glass of Marsala over it, and another of blond of veal, add a sprig of thyme, a bay leaf, four peppercorns, a clove, a tablespoonful of mushroom cuttings, and reduce half. In another saucepan put two cups of Espagnole sauce, one cupful of tomato sauce, and half a cup of game stock or essence. Reduce a third, and add the contents of the first saucepan, boil the sauce a few minutes, and pass it through a sieve. Warm it up in a bain-marie before using.
Source: ''The Cook's Decameron: A Study In Taste, Containing Over Two Hundred Recipes For Italian Dishes'' from a project that puts out-of-copyright texts into the public domain. This is from a *very* old source, and reflects the cooking at the turn of the last century. Update as necessary.