Oyster Artichoke Bisque

• 36 oysters (fresh chop)
• 6 artichokes
• 2 oyster liquor
• 1 salt
• 1/4 bacon drippings
• 950 ml whipping cream
• 240 ml artichoke stock
• 120 gr onion (chop)
• 55 gr butter margarine (not)
• 50 gr celery (chop)