Chicken Andouille and Oyster Gumbo

Name: Chicken, Andouille, and Oyster Gumbo
Ingredients: 1 roasting hen (3 to 4 pounds), cut into frying pieces; Salt and cayenne pepper; 1 cup vegetable oil; 1 cup all-purpose flour; 2 1/2 cups chopped onions; 1 cup chopped green bell peppers; 1 cup chopped celery; 10 cups chicken broth; 2 bay leaves; 1/2 teaspoon dried thyme leaves; 1 pound andouille, cut crosswise into 1/4-inch slices; 1 pint freshly shucked oysters with the liquor