As JS’s powers of observation seem to exist in all lines, CD begs further information from him and [H. N. B.] Erskine about the natives’ expressions of indignation, affirmation, and negation. The movements of the eyebrows and forehead of a girl in violent grief are of particular interest.

Do sub-breeds of pigeons exist in India as in Europe, but not in England? If so, what is the colour of the plumage in males and females at different stages of development?

Observations on expression and colour of beard and hair in natives of India.

Observations on expression and variation in Asian peoples: when colour of beard and hair differ, beard is always lighter. Differences in swimming strokes. Polydactylism.

Has just sent Hooker a paper on Sikkim tree-ferns [Trans. Linn. Soc. Lond. 30 (1875): 1–44, read 1870].

Has had fever since the end of the rains.