My dear Sir

I received a few days ago a small box (registered) containing dried flower-heads with brown seeds somewhat sculptured on their sides. There was no name, & I sh^d. be much obliged if some time you would tell me what these seeds are.¹ I have planted them.—

I sent you some time ago my little book on Earth-worms, which, though of no importance has been largely read in England.—²

I have little or nothing to tell you about myself. I have for a couple of months been observing the effect of Carbonate of Ammonia on Chlorophyll & on the roots of certain plants; but the subject is too difficult for me & I cannot understand the meaning of some strange facts which I have observed.³ The mere recording new facts is but dull work.—

Prof. Wiesner has published a book, giving a different explanation to almost every fact which I have given in my Power of Movement in Plants.—⁴ I am glad to say that he admits that almost all my statements are true. I am convinced that many of his interpretations of the facts are wrong, & I am glad to hear that Professor Pfeffer is of the same opinion;⁵ but I believe that he is right & I wrong on some points. I have not the courage to retry all my experiments; but I hope to get my son Francis⁶ to try some fresh ones to test Wiesners explanations.— But I do not know why I have troubled you with all this.—

My dear Sir | yours very sincerely | Charles Darwin