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."

"Mr Darwin presents his compliments to the Master & Fellows of Caius Coll. and is extremely sorry he is prevented by a previous engagement the honor of dining with them on Thursday."

Informs WDF of his activities since the Beagle landed.

Has written to Royal College of Surgeons, exactly as RO recommended, concerning disposition of his South American fossil bones. He fixed on the British Museum, rather than Paris, to receive plaster casts, because he was on board a King’s ship. Suggests RO propose another set for Paris, where they would be more useful than at BM. Has scarcely begun unpacking his cases.

"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."