Dear Dyer

I must tell you how greatly I am pleased & honoured by your article in Nature which I have just read.¹ You are an adept in saying what will please an author,—not that I suppose you wrote with this expressed intention. I sh^d. be very well contented to deserve a fraction of your praise. I have, also, been much interested, & this is better than mere pleasure, by your argument about the separation of the sexes. I daresay that I am wrong, & will hereafter consider what you say more carefully; but at present I cannot drive out of my head that the sexes must have originated from two individuals, slightly different, which conjugated. But I am aware that some cases of conjugation are opposed to any such view.—²

With hearty thanks | Yours sincerely | Charles Darwin