Duck Liver Terrine

• 90 speck
• 45 butterfat cream
• 4 egg yolks
• 4 grapes
• 3 1/2 armagnac
• 2 sultana grapes in bunches
• 1 1/2 kg -duck
• 240 gr duck livers
• 16 ml vegetable oil
• 14 gr butter