Page 65. " Jim never asked no questions, he never said a word; but the way he worked for the next half an hour showed about how he was scared "

This is another part of the story where we can see the main characters motivated by fear. Everything Jim and Huck did here they did for fear of the consequences of getting caught or seen. Huck ordered Jim to be quiet and move quickly in fear of his father and Jim obeyed also out of terror.