He began a major reassessment of his theory of species, and in November realised that divergence in the character of descendants could be explained by them becoming adapted to "diversified places in the economy of nature".
Retomou o seu traballo nas especies en novembro e decatouse de que a diverxencia nos caracteres dos descendentes poderían ser explicada pola adaptación destes a "diversificados lugares na economía da natureza".