Wrote a "frightful screed" about aristocracy’s being a necessary consequence of natural selection, and then burnt it.

H. W. Bates is the only man "thinking out" natural selection to any purpose. "I think I have driven Bates back to Nat. Sel. as the only way of solving his difficulties."

HWB’s mimetic butterflies.

JDH wishes he had time to do the same thing with plants.

Owen and Huxley involved in a "contemptible" squabble in the Edinburgh newspapers.

Maximovitch reports Stellaria bulbifera is a Siberian form which never ripens its seeds.

Encloses note from Murray, hoping it will be satisfactory. Murray is ready to see as much of MS as possible. Murray is considered honest but may be cautious, since HWB’s name is unknown to the public.

Returns HH’s essay.

Has been considering how to incorporate JH's suggestions regarding the insertion of the Julian dates in the Nautical Almanac. Would like his views. Quotes extracts from a letter of U. J. J. Leverrier.

CK defended CD’s theory at a shooting party with the Bishop of Oxford, the Duke of Argyll, and Lord Ashburton. The discussion started as a result of shooting some blue rock-pigeons which were different from blue rocks of other localities. CK held that all pigeons were descended from one species.

CK proposed that mythological races, e.g., elves and dwarfs, were intermediate species between man and apes, and have become extinct by natural selection; i.e., by competition with a superior white race of man.