Has received copy of CL’s Principles [7th ed.].

Comments on reading Annales des sciences naturelles.

David Milne’s and Robert Chambers’ views on Glen Roy.

Mentions sales of South America.

Describes visit to his father at Shrewsbury.

Comments on correspondence between CL and Whewell [concerning university reform].

Criticises S. G. Morton’s "Hybridity in animals" [Am. J. Sci. 2d ser. 3 (1847): 39–50, 203–12].

Questions Mrs W on difference in flight capacity of male and female silkworm moths and asks her for results of experiments he suggested she do with silkworms to determine hereditariness of dark "eyebrows". [See Variation 1: 302.]

Thanks Mrs Lyell for barnacle specimens.

Mentions Agassiz’s classification of saurians.

Discusses letter from Chambers on "roads" in Scottish glens; views of Agassiz and Buckland on the glens.

Is reading Hugh Miller [First impressions of England and its people (1847)].

Discusses enclosed figures on elevation of terraces in several Scottish glens as surveyed by William Kemp and David Stevenson. Comments on Robert Chambers’ view of the terraces. Mentions a letter on the terraces, originally written for publication, which he has asked Robert Jameson [editor of the Edinburgh New Philos. J.] to destroy.

Accepts AC’s offer to conduct hybridisation experiments, and offers suggestions.

Sends book [Journal of researches, 2d ed. (1845)].

Offers HM-E some specimens of Lernaea, a crustacean parasite on Balanus elongatus.

Mentions opinion of Harry Goodsir about a form CD believes to be the larva of Lernaea.

Discusses loan of cirripede specimens from the British Museum.

Is searching for a tooth of Carcharias which he might have left with RO.

CD asks if he may have the use of the cirripedes JS collected in Portugal. He will need to break up or make a section of at least one of each species.

Expresses admiration for JS’s paper on Malta ["On recent depressions in the land", Q. J. Geol. Soc. Lond. 3 (1847): 234–40], with its striking demonstration of the change of level between land and water there discovered.

Discusses loan of cirripede specimens from the British Museum and problems of classification. Encloses a note of thanks to be laid before the Trustees [see 1153].

Invites GRW to a dinner party with other scientists.

CD cannot find the lagoon-island mud that WCW asked about, but he sends other geological specimens he hopes will be interesting.

Comments on Ann Susan Horner’s escape in a dangerous incident at sea.

Compares addresses by William Buckland and CL, delivered at recent meeting of the Geological Society.

Discusses the views on Glen Roy in Chambers’ Ancient sea-margins [1848].

Speculates that Chambers wrote Vestiges [of creation (1844)].

Comments on apology by Chambers for using some of CD’s material without acknowledgment in discussing Glen Roy. His opinion of Chambers’ book [Ancient sea-margins (1848)].

Mentions returning borrowed book by Camillo Ranzani.

Discusses loan of cirripede specimens from British Museum. "In truth never will a mountain in labour have brought forth such a mouse as my book on the Cirripedia. It is ridiculous the time each species takes me."

Describes his cirripede work. Asks whether HM-E can arrange for him to borrowspecimens, especially of species described in Dumont d’Urville, Voyage of"Astrolabe" [1830–2]. Lists species that interesthim.

Compliments HM-E on his Crustacés [1834–40].

Asks about collection of mollusc specimens he had lent to Richard Owen.

Asks about seeing cirripede collection of the College.

Comments on larva of Scalpellum.

Belittles the loss of a book borrowed from CD.

Acknowledges cheque in payment for purchase of microscope for John Lubbock.

Thanks JWL for the use of a schoolroom.

Arranges to meet JWL’s son [John] to discuss use of microscope.

Mentions illness.

Thanks JWL for his paper ["Shooting stars", London Edinburgh & Dublin Philos. Mag. 32 (1848): 81–8, 170–2; 35 (1849): 356–7].