Catch-of-the-Day Chowder

My notes say this recipe is by Bill Cleghorn. I don't know Bill, and I don't know how I ended up with his recipe, but I'm in his debt. Thanks, Bill!

• 1 stalk celery, sliced
• 1 onion, chopped
• 2 cups potatoes, cubed
• 2 cups water
• 2 cups cream (half & half)
• 1 pound fish, cubed (or any seafood combination)
• 1/4 cup flour
• 1/2 cup clam juice
• 2 tablespoons butter
• 1 teaspoon salt
• 1/4 teaspoon pepper

Cover and cook celery, onions, and potatoes in water for 10 minutes. Add fish and cook 10 minutes longer. Blend flour and clam juice, add to vegetable/fish mixture. Stir until bubbly. Add cream, butter, salt, and pepper, heat thoroughly.