Forwards a letter from Secretary of Yorkshire Philosophical Society. Hopes CD will honour them by accepting.

Has heard nothing of Variation.

WSD is delighted to hear that first edition [of Variation] has sold so well.

Has received a cheque from J. Murray for 30 guineas, double what was agreed upon. Sends a postal order for the five guineas CD sent him [see 5788].

WSD expresses his willingness to do further translating for CD. Sends terms of remuneration.

The Athenæum article [review of Variation, 15 Feb 1868, pp. 243–4] is a disgrace.

WSD will keep CD’s queries about Hemiptera in mind. Secondary sexual characters are certainly more marked in exotic than in British species.

Has sent his translations [of parts of Theodor Piderit, System der Mimik und Physiognomik (1867)].

Fritz Müller’s Für Darwin [1864] would sell if well translated. WSD would be glad to undertake it.

Has difficulty translating Piderit’s use of verbissen.

Will hold F. Müller’s book until CD decides about translating it.

Thanks CD for second issue of Variation.

Is glad CD is satisfied with his translation of Piderit.

Will not start on Müller [Für Darwin] until CD has communicated with the author.