To understand Leschenaultia pollination CD requires field observations in the native country.

Has observed two forms of cowslips, which he calls male and female. The same two forms are found in primroses.

Observations on changes in physical proportions of pigeons.

The Saturday Review of 5 May has a defence of CD and THH by "a jolly good fellow".

Saw Salter’s Spirifer specimens; a very good proof of indefinite modifiability.

Beginning to think gap between Cambrian and Lower Silurian enormous.

Édouard Lartet to give paper before Geological Society ["On coexistence of man with certain extinct quadrupeds", Q. J. Geol. Soc. Lond. 16 (1859–60): 471–5].

Discusses the possibility of stereoscopic photography of action scenes. Also speculates about color photography.