JDH may put CD’s name down for £200 for the proposed fund.

Does JDH have a plant of Porlieria hygrometrica he could lend to CD?

Regrets he cannot sign a memorial for correspondent’s father [Edward Truelove], which states an opinion on a life that is totally unknown to him. Feels that Edward Truelove’s sentence was very harsh [ET was imprisoned and fined for selling "obscene" publications advocating artificial control of conception] even though CD is strongly opposed to all the views expressed.

Comments on R. D. Owen’s Moral physiology [1831].

Has no doubt WHD’s experiments on mutation of lower organisms under changed conditions of life will be curious and valuable. The fact of their becoming accustomed to much higher temperatures than those to which they are adapted is very remarkable. It explains the existence of algae in hot springs.

Suggests FD call on Carl Semper.

Inquires about Porlieria: Do the leaves shut to check evaporation? Does it appear silver under water?

Explains how he thinks the pulvinus acts; wishes FD would investigate the point.

Will be glad to see OCM at Down. If he comes Friday, he will meet J. F. McLennan, author of Primitive marriage, a "remarkable man".

CD contributes £200 to JDH’s Royal Society fund.

Hopes Baillière will inform Cosserat how pleased he is with the new translation of Coral Reefs.

Delighted to see him on Tuesday.

Has a magnificent bush of Porlieria. There is no vestige of bloom; CD will test for sleep movements. Reports successful experiments on temperature-induced sensitivity of radicles.

Describes sleep movements in Porlieria and his experiments on movements of radicles.

Thalia flowers have interesting mechanism to ensure cross-fertilisation.

Has been approached by [H. R. Hope-]Pinker who wishes to sculpt him for the Royal Institution; asks whether WS has any knowledge of the matter.

Asks for sketches of [Thalia] pistil, in which he is much interested.

Letter of condolence on reading Times report of death of WDF’s daughter.

Rejoices that "Lagrange’s case does not seem very bad".

CD is working hard at dissecting Thalia. Has recovered some handiness with microscope.

Thanks GHD for his drawings [of Thalia]. Some parts need attention.

Asks for list of families of sleeping plants. Believes sleep is merely modified circumnutation at a particular time of day.

Porlieria has had no water for some time but shows no sign of flagging.

Describes the response of Thalia flowers to touch.

Writes to say that the point on which he thought GHD’s drawings were mistaken proves to be an error in his own observation.

Enjoyed OCM’s visit.

Sends photographs.

Movement and sensitivity of flower parts; relationship to cross-fertilisation.

A report has arrived for FD which CD will forward.