Put the blackberries into the punch bowl and pour the cherry, rum and brandy over them. Now add sugar and let it stand for half an hour. Pour a third of the white wine and let the punch stand for another half hour in a cool place.
Before serving, add the remaining white wine. Stir carefully and finally add the champagne. Bring to the table in a cool place.
* From the Delicatessen Dept. Grocery store