Thanks VD for information on caterpillars selecting food plants from within one family,

and on similar behaviour in hogs, which will not eat any plants from a family containing some poisonous members.

CD is glad to hear of nature of JF’s work;

proposes that JF call when CD comes to London.

Has read JF’s attack on Agassiz ["Agassiz and Darwinism"] in Popular Science Monthly [3 (1873): 692–705].

Discusses experiments and observations on pitchers [of Nepenthes]. Suggests procedures for JDH to follow.

Any plant of any family with a terminal or with any lateral leaflets greatly reduced would be interesting to CD for studying spontaneous movements.

Has not received Eucalyptus or Acacia plants from Rollisson.

W. H. Flower is ill and obliged to go off for six months. Wants to return the money Flower contributed to fund for his holiday, asks the amount.

Letter of introduction for Mr Bradley, an expert on spiders.

Thanks for the paragraph, which he had not seen and now returns.