Final answer:
The dialogue in paragraphs 67-68 of 'The Monkey's Paw' indicates that Herbert and Mrs. White are nervous about the harm that the paw might cause.
Step-by-step explanation:
The dialogue in paragraphs 67-68 of the story 'The Monkey's Paw' indicates that Herbert and Mrs. White are nervous about the harm that the paw might cause. In the dialogue, Mrs. White expresses her concern about the potential consequences of their wish, while Herbert acknowledges the danger and tries to reassure her by saying, 'Of course not.' This dialogue suggests that both characters are aware of the potential risks and are apprehensive about the possible harm that the monkey's paw could bring.