Imagine you are Valjean and you have just seen Javert outside your door. How do you feel? What will you do next? Where will you go? What will you tell Cosette? Write as much as you can.
At first, I would feel surprised and like my heart skipped a beat. and also I would think I should leave this city, like in this story. but thinking over little more about it, I don't think it is necessary to leave the city, because Javert thinks Valjean is dead and he knows that there are people who are similar to Valjean. Also, Cosette is calling Valjean 'father'. Javert thinks Valjean doesn't have a daughter, but having someone call Valjean 'father', there's little chance that Javert will think he is Valjean