In a saucepan (nonaluminum and large) bring the wine, sugar, spices, orange and lemon peel to a simmer, stirring frequently.
1500 ml red wine, 1/2 cup brown sugar, 12 whole cloves, 4 cinnamon sticks, 1 orange peel, 1 lemon peel
Simmer for 10 minutes. You should see very small bubbles, it should not be a roaring boil as this will reduce the alcohol content.
Stir in the brandy and the port, just long enough for them to heat through, about 1 minute.
2 cups ruby port, 2 cups brandy
Remove from the heat and enjoy immediately. If this is for a party, I recommend transfering it to a crockpot and keeping it on the warm setting.