Suggests that, if HdV make further observations on tendrils, he attend to Echinocystis, as described on p. 132 of Climbing plants.

Thanks for PPCH’s ["Entwicklungsgeschichte der Entomostraken, pt 1: Embryologie von Balanus", Niederl. Arch. Zool. 3 (1876–7): 47–82].

Arranges for HdeV to call.

Regrets he cannot receive HdeV at Down, because he has just left home.

Enjoyed seeing HdeV yesterday.

Following the point mentioned by HdeV, CD has observed the difference in corrugation of primary roots in plants exposed to dry and damp soil.

Discusses heliotropism in plant cotyledons. Asks for information.

Thanks for letter.

Comments on growth and movement of plants.

Perhaps movement from side to side in plants is caused by the contraction of one side, rather than the expansion of the other.

Sends seeds of Lychnis Githago: he observed the hypocotyledenous stem, not the root, contracting.

Delighted to hear that HdeV intends working on the causes of variation.

Can HdV supply a reference to a paper describing a stem or a root divided longitudinally and the separate parts acted on by geotropism.

Thanks him for magnificent work on Pycnogonida [The zoology of the voyage of H. M. S. Challenger, vol. 3, part 10 (1881)].

Is delighted that he is undertaking the Cirripedia [1883–4].

Thanks for HdeV’s letter, which is a great relief to him.

Thanks for copies of HdV’s two articles on climbing plants (Vries 1873a and 1873b).

Thanks for publication [Berste bijdrage tot een nauwkeuriger kennis der sessile cirripedien (1875)]. Cannot read Dutch. Mentions PPCH’s research on cirripedes.