Will call on Sir J. Herschel, then take short trip in the African desert.

Horrified at the publication of "the little book of extracts" from his letters to Henslow ["Letters to Professor Henslow" (1835), Collected papers 1: 3–16].

In five days of geologising on St Helena, he found that the shells on high land had been mistakenly identified as seashells. They are land shells, but of species no longer living.

Can think of nothing but the return to England and his family.

Last four days have been spent calling on naturalists. Geologists have been kind, but zoologists seem to think a number of undescribed creatures a nuisance.

Will send his belongings to Cambridge, but eventually his quarters must be London.

FitzRoy is to be married.

His fossil bones are unpacked and some are great treasures. He has some geology to do: R. I. Murchison has lent him a map and asked him to look at a part of the country he has been describing.

Their only protection against having Harriet Martineau as sister-in-law is that she works Erasmus too hard.

Dinner at the Hensleigh Wedgwoods’. They have agreed to go over his journal. Henry Holland thinks it not worth publishing alone because it goes over FitzRoy’s ground.

His impressions of Harriet Martineau: "She is overwhelmed with her own projects, her own thoughts and own abilities."

"Read a letter [to AC] of the 19th Instant from Mr Charles Darwin of Christs College, Cambridge stating that understanding from the Conservators that a Series of fossil Bones collected during the voyage of H: M: Surveying Vessel Beagle possesses a peculiar Interest as connected with Specimens already in the Museum of this College that it had always been his intention to present such Bones to some public collection on the condition that Casts thereof should be given to the leading Public Bodies for the sake of making them more generally useful, specifying the British Museum the Geological Society and the Universities of Cambridge and Oxford, and one set for himself: and that under such Conditions he should be most happy to present the entire series to the Museum of this College."

A defence of the work of missionaries in the Pacific islands and Australia. [The letter was apparently written by RF with supporting evidence quoted from CD’s journal. The letter is signed by RF alone. A summary conclusion, as printed, is signed by both:] "On the whole, balancing all that we have heard, and all that we ourselves have seen concerning the missionaries in the Pacific, we are very much satisfied that they thoroughly deserve the warmest support, not only of individuals, but of the British Government."