Plans to come to London to examine the proofs of JdeCS’s plates [for Fossil Cirripedia (Lepadidae)]. Has new German specimens; one is unknown and must be introduced but a woodblock will do.

Asks about source of paper on the metamorphosis of Pycnogonida for C. S. Bate.

CD likes the engravings [for Fossil Cirripedia (Lepadidae)] but is distressed by JdeCS’s slow progress and is being pressed by owners to return their specimens.

Acknowledges contribution to Down Coal and Clothing Club.

Sends thanks for a note and returned drawing.

He is sending more text.

CD is pleased with plates [for Fossil Cirripedia (Lepadidae)]; most corrections need only a touch. Requests revises soon and asks how much he owes.

CD likes the plates [for Fossil Cirripedia (Lepadidae)] except pl. I [Scalpellum], which calls for several revisions; he sees that not all corrections were made, but assumes they called for too extensive changes.

CD appreciates JdeCS’s care. Sends specimens, noting points to be observed. He adds that the figures which have been most troublesome are those of which drawings were made [for Fossil Cirripedia (Lepadidae)].

Cirripede fossil specimens returned.

G. B. Sowerby’s plates [for Living Cirripedia] are ready for the printer.

Thanks DS for writing about his research on foliation and cleavage. Discusses nature of slate and metamorphic schists.

Makes suggestions for the paper DS is preparing for the Royal Society and raises questions for his consideration; CD hopes he can attend the Society meeting when the paper is read ["On foliation and cleavage of Scotland", Philos. Trans. R. Soc. Lond. 142 (1852): 445–62].

Ray Society has given CD 22 copies [of Living Cirripedia, vol. 1].

Thanks GCH for Balanus specimens.

Returns Lake Superior [1850], which he already has received from Agassiz. Thanks for pamphlets by C. B. Adams [on Mollusca, Contrib. Conchol. 10 (1851): 189–206; 11 (1852): 207–15].

Describes his dissection of an unusual cirripede [Alcippe lampas] with 12 males attached [see Living Cirripedia 2: 556, 558].

Volcanic activity of Mt Kilauea as described by Dana [Am. J. Sci. 2d ser. 9 (1850): 347–64]. Discusses the mechanics of volcanic eruption. Disputes view of William Hopkins that simultaneous action by volcanoes of different heights must come from separate lava sources. Notes relationship of continental elevation to volcanic action.

Thanks for specimens of cirripedes attached to rocks, which show no boring. CD hopes to see some on limestone.

Encourages CSB to do research on the complemental males of Scalpellum vulgare.

Discusses geological foliation and cleavage. Urges ACR to read CD’s remarks on subject in his South America before ACR publishes his paper ["On the lower Palaeozoic rocks", Q. J. Geol. Soc. Lond. 9 (1853): 161–79].

Discusses JAHdeB’s drawing of a Verruca.

Describes meeting of Geological Society [1 June 1853].

Mentions his criticism of Murchison’s lecture on flints.

Describes Robert Chambers’ "On the glacial phenomena in Scotland" [Edinburgh New Philos. J. 54 (1853): 229–82].

Mentions controversial election of members to the Royal Society.

Will quote CSB on discovery of Alcippe lampas.

Hopes CSB continues to look for Verruca on limestone.

Discusses use of CSB’s larvae illustrations [for Living Cirripedia].