"I think it probable," he wrote, "from the character of the pes, that the primitive forms, whence the existing Marsupialia have been derived, were arboreal animals; and it is not difficult, I conceive, to see that, with such habits, it may have been highly advantageous to an animal to get rid of its young from the interior of its body at as early a period of development as possible, and to supply it with nourishment during the later periods through the lacteal glands, rather than through an imperfect form of placenta" (p. 655).
— from Form and Function: A Contribution to the History of Animal Morphology by E. S. (Edward Stuart) Russell

It has become habitual now, and there is no difficulty in calming the spirits of the children to the proper tone, for they have been trained by a man who is unaffected and sincere.
— from The Lonely Island: The Refuge of the Mutineers by R. M. (Robert Michael) Ballantyne

Emasculation would have little influence in preventing a recurrence of this crime, for the operation does not render its subjects immediately impotent, nor does it change their sexual nature any more than it beautifies their character.
— from The Fertility of the Unfit by W. A. (William Allan) Chapple