Water Prince Corner Shop Chowder

Name: Water-Prince Corner Shop Chowder
Ingredients: 1⁄4 lb. salt cod; 6 cups fish stock; 1⁄2 lb. skinless haddock, pin bones removed; 1⁄2 lb. skinless halibut, pin bones removed; 1⁄2 lb. bacon, roughly chopped; 6 tbsp. unsalted butter; 3 stalks celery, finely chopped; 1 large yellow onion, finely chopped; 1⁄2 cup flour; 1 cup heavy cream; 1 lb. waxy potatoes, peeled and roughly chopped; 1⁄4 lb. cooked lobster meat, cut into 1″ pieces; 1⁄4 lb. jumbo lump crabmeat, picked over for shell pieces; 1⁄4 large sea scallops, roughly chopped; Kosher salt and freshly ground white pepper, to taste; 2 tbsp. finely chopped tarragon