Venison Barbecue

3 lb venison roast
1 c catsup
1 tb salt
2 tb worcestershire sauce
1/4 c vinegar
1 tb butter
1/8 ts cinnamon
3 slices lemon
1 onion, sliced thin
1/8 ts allspice

Sear 3-pound roast of venison in frying pan. Mix remaining ingredients in
saucepan and bring mixture to boil, stirring to avoid burning, and simmer
10 minutes. Cover venison with the sauce and roast in moderate oven (350
degrees F.). Cook 1 1/2 to 2 hours - turning occasionally.