Bring water to a boil in dutch oven; add potatoes. Cover and cook 10 minutes. Fry bacon until transparent; add onion and cook until onion is soft and bacon is lightly browned. Add bacon, onion, bacon drippings, fish fillets, and thyme to potatoes. Simmer 10 minutes or until potatoes are tender. Stir in half-and-half, salt, and pepper; simmer 5 minutes. Sprinkle with parsley.
