Thanks him for Balanus specimens. Comments on his findings. A large Acasta in the wet state would be valuable. Asks JSB to mention his work to J. T. Quekett at the College of Surgeons.

[Valediction only.] CD note on verso: Athenaeum/48/p. 839 "E. Forbes on genera being continuous in time––good––fact".

Testimonial recommending B. Waterhouse Hawkins [for a teaching post].

Suggests various remedies for toothache.

Seeks excuse from jury duty on grounds of ill health.

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.

Thanks WCW for his article ["Microscopical objects found in mud of Levant", Mem. Lit. & Philos. Soc. Manchester 2d ser. 8 (1848):1–128]. Comments on it; offers to send Ascension Island specimens. Urges WCW to re-examine coal-beds for Infusoria to determine whether intervening beds were deposited by sea-, brackish, or fresh water.