Has sent copy of his new book, Colour-sense [1879]; in anticipation of criticism, he justifies his reliance on recorded observations rather than experiments, by the heavy demands of his career as a journalist.

Thanks for criticisms of Colour-sense.

Clarifies his views that actions desirable for species result in development of nervous organs capable of pleasurable stimulation.

Believes that all "tastes" occurring in nature are explicable with reference to ancestral habits and that none is purely arbitrary.

Thanks for postcard informing him of Delboeuf’s review of his book; he had already seen review.