J. T. Knowles [editor of Contemp. Rev.] hopes W. D. Whitney’s article will be a long one.

CD is sorry about GHD’s account of his low spirits. "I know well the feeling of life being objectless & all being vanity of vanities."

CD recounts events of the April-fool’s day séance at Hensleigh [Wedgwood]’s. Asks GHD to find out whether Sidgwick’s account of it agrees with what he has heard. "What rubbish the whole does seem to be!"

Suggests GHD write a supplement to his review [of A. H. Huth’s The marriage of near kin (1875)]. Feels sorry Huth was taken in by the Legrain fraud. [See Autobiography (1958), pp. 143–4.]

CD’s suspicions that Legrain falsified experiments on interbred rabbits are like second sight. Has sent a copy of the letter to A. H. Huth.

Henry Sidgwick and A. J. Balfour are "spiritualising" again.

Sends comments and suggestions for Huth’s experiment on crossbreeding rabbits.

Sends an article for CD’s opinion.

Has finished an account of the globes for the Philosophical Magazine ["On maps of the world", 50 (1875): 431–44].

His poor health has interfered with his pitch experiments.

Pleased by W. Stanley Jevons’ letter.

Has ordered Dr Cohn’s book.

Is sure that GHD’s energy will lead to success with work on viscous fluids.

Asks that a copy of GHD’s paper on cousin marriage be sent to Hermann Müller. J. F. McLennan admires it "as a model".

Has sent a copy [of his article on cousin marriage] to Hermann Müller.

Problem he is now working on is a tough nut: "It does not do what [James Clerk] Maxwell said it wd or ought to do".