Lay the ham on the bottom of a stewpan, cut up the veal and cow-heel into small pieces, and lay them on the ham; add the poultry trimmings, vegetables, herbs, sherry, and water, and let the whole simmer very gently for 4 hours, carefully taking away all scum that may rise to the surface; strain through a fine sieve, and pour into an earthen pan to get cold. Have ready a clean stewpan, put in the jelly, and be particular to leave the sediment behind, or it will not be clear. Add the whites of 3 eggs, with salt and pepper, to clarify; keep stirring over the fire, till the whole becomes very white; then draw it to the side, and let it stand till clear. When this is the case, strain it through a cloth or jelly-bag, and use it for moulding poultry, etc. Tarragon vinegar may be added to give an additional flavour.
Time: Altogether 4 1/2 hours.