“The only use of camphor is at the moment when you take a cold,” said Dr Mitford; “identify that moment, and take your dose, and you are all safe. But I have always found that the great difficulty was to identify the moment. Did you point out to Miss Crediton the curious effect the current has had upon the rocks? I am not geological myself, but still it is very interesting. The constant friction of the water has laid bare a most remarkable stratification. Ah! I see he did not point it out, from your look.” “Indeed I don’t think Mr John showed me anything that was instructive,” said Kate, with a demure glance at him. At present she was having it all her own way. “Ah! youth, youth,” said Dr Mitford, shaking his head. “He was much more likely to tell you about his boating exploits, I fear. If you really wish to understand the history and structure of the district, you must take me with you, Miss Crediton. Young men are so foolish as to think these things slow.” “But then I am going away to-morrow,” said Kate, with a little pathetic inflection of her voice. “And perhaps Mrs Mitford will never ask me to come back again. And I shall have to give up the hope of knowing the district. But anybody that steers so badly as I do,”--Kate continued, with much humility, but doubtful grammar, “it is not to be wondered at if the gentleman who is rowing them should think they were too ignorant to learn.” “Then the gentleman who was rowing you was a stupid fellow,” said the Doctor. “I never had a more intelligent listener in my life; but, my dear young lady, you must come back when the Society is here. Their meeting is at Camelford, and they must make an excursion to the Camp.” “And you will come and stay with us, Dr Mitford,” said Kate, coaxingly; “now, promise. It will be something to look forward to. You shall have the room next the library, that papa always keeps for his learned friends, he says. And if Mrs Mitford would be good, and let the parish take care of itself, and come too----”