Discusses possibility of publishing a sketch of his views.

Comments on CL’s letter [1862].

Mentions various geological topics.

Asks to borrow publication by Heer.

Mentions flight of Colymbetes over ocean.

Recalls visit by Wollaston.

Notes views of Hooker and Huxley on species.

Mentions ability of ducks to transport plant seeds.

Urges CD to publish his theory with small part of data.

Corrects names of land shells on list of shells picked up at Down.

Discusses transport of Ancylus from one river-bed to another by water-beetle.

"I hear that when you & Hooker & Huxley & Wollaston got together you made light of all Species & grew more & more unorthodox."

Mentions discussion of old Atlantis by Oswald Heer.

Comments on Helix and Nanina.

Mentions beetle discovered with small bag of eggs of water-spider under wing.

Madeira evidence favours single species birth-place theory.