Chicken with Forty Cloves of Garlic

Name: Chicken with Forty Cloves of Garlic
Yield: Serves 4
Ingredients: 2 celery stalks, including leaves; 2 rosemary sprigs; 4 thyme sprigs; 4 parsley sprigs; 1.6 kg (3 lb 8 oz) chicken; 40 garlic cloves, unpeeled (see Note); 2 tablespoons olive oil; 1 carrot, roughly chopped; 1 small onion, cut into 4 wedges; 250 ml (9 fl oz/1 cup) white wine; 1 baguette, cut into slices