Quotes from a Fritz Müller letter of 9 Aug supporting CD’s views that leaves position themselves at night so as to minimise heat loss by radiation. It is a new fact to CD that leaves take different positions at different seasons.

CD interested in JBI’s observations of behaviour of bees. Finds his criticism about hexagonal cells made by queen wasps a good one. Cannot remember how he got out of the difficulty.

His book on worms to be published soon.

E. A. Darwin has died after short illness.