Pass the ham through a mincing machine 2 or 3 times or chop very finely. Then pound well and rub through a fine sieve. Add gradually the mace, pepper, nutmeg and cayenne and mix well together. Put into a well greased pie-dish, and cover with greased greaseproof paper. Bake in a moderate oven (350° F., Gas 4) for about ¾ hr. When cooked, press into small pots and cover with clarified butter.