I have an old belief that a good observer really means a good theorist (118/1.

For an opposite opinion, see Letter 13.), and I fully expect to find your observations most valuable.

I am very sorry to hear that your health is shattered; but I trust under a healthy climate it may be restored.

I can sympathise with you fully on this score, for I have had bad health for many years, and fear I shall ever remain a confirmed invalid.

I am delighted to hear that you, with all your large practical knowledge of Natural History, anticipated me in many respects and concur with me.