[After describing how he had just come back from a nine months' cruise)--First and foremost, my dear mother, I must thank you for your very kind letter of September 1848. I read the greater part of it to Nettie, who was as much pleased as I with your kindly wishes towards both of us. Now I suppose I must do my best to answer your questions. First, as to age, Nettie is about three months younger than myself--that is the difference in OUR years, but she is IN FACT as much younger than her years as I am older than mine. Next, as to complexion she is exceedingly fair, with the Saxon yellow hair and blue eyes. Then as to face, I really don't know whether she is pretty or not. I have never been able to decide the matter in my own mind. Sometimes I think she is, and sometimes I wonder how the idea ever came into my head. Whether or not, her personal appearance has nothing whatever to do with the hold she has upon my mind, for I have seen hundreds of prettier women. But I never met with so sweet a temper, so self-sacrificing and affectionate a disposition, or so pure and womanly a mind, and from the perfectly intimate footing on which I stand with her family I have plenty of opportunities of judging. As I tell her, the only great folly I am aware of her being guilty of was the leaving her happiness in the hands of a man like myself, struggling upwards and certain of nothing. As to my future intentions I can say very little about them. With my present income, of course, marriage is rather a bad look out, but I do not think it would be at all fair towards Nettie herself to leave this country without giving her a wife's claim upon me...It is very unlikely I shall ever remain in the colony. Nothing but a very favourable chance could induce me to do so. Much must depend upon how things go in England. If my various papers meet with any success, I may perhaps be able to leave the service. At present, however, I have not heard a word of anything I have sent. Professor Forbes has, I believe, published some of Macgillivary's letters to him, but he has apparently forgotten to write to Macgillivray himself, or to me. So I shall certainly send him nothing more, especially as Mr. Macleay (of this place, and a great man in the naturalist world) has offered to get anything of mine sent to the Zoological Society. [In the paper mentioned in the letter of March 21, above ("On the Anatomy and Affinities of the Family of the Medusae"), Huxley aimed at] "giving broad and general views of the whole class, considered as organised upon a given type, and inquiring into its relations with other families," [unlike previous observers whose patience and ability had been devoted rather to] "stating matters of detail concerning particular genera and species." [At the outset, section 8 ("Science Memoirs" 1 11), he states--]