Thanks for Orchids.

Plans to publish soon on hybrids.

Thanks for informative letter of 2 February. CD is glad to have CVN’s opinion on the crossing of varieties of melons,

has made use of his memoir on the Cucurbitaceae ["Cucurbitacées cultivées au Muséum d’Histoire Naturelle en 1862", Ann. Sci. Nat. (Bot.) 18 (1863): 159–208]

and anticipates with great interest his work on hybridisation.

Congratulates CD on the Copley Medal.

Directs CD to his short memoir on crossing ["De l’hybridité", C. R. Hebd. Acad. Sci. 59 (1864): 837–45].

Thanks CVN for reference to the Comptes Rendus [Académie Française].

Mentions CVN’s work on Cucurbitaceae and notes that he (CD) has quoted extensively from it in Variation.

Hopes to send paper on Lythrum [Collected papers 2: 106–31] soon.

Mentions exchange of photographs.

Thanks CD for his paper "Climbing plants" [see 4861] and for a photograph.

Hopes soon to send a copy of his memoir on hybridisation

and with it will forward a short note on the tendrils of the Cucurbitaceae.

Thanks for Variation.

Complains of a severe facial neuralgia.

He is planning to build an experimental laboratory in the south.