1834-1837: AGE 27-30.
First Visit to England.--Reception by Scientific Men.--Work on
Fossil Fishes there.--Liberality of English Naturalists.--First
Relations with American Science.--Farther Correspondence with
Humboldt.--Second Visit to England.--Continuation of "Fossil
Fishes."--Other Scientific Publications.--Attention drawn to
Glacial Phenomena.--Summer at Bex with Charpentier.--Sale of
Original Drawings for "Fossil Fishes."--Meeting of Helvetic
Society.--Address on Ice-Period.--Letters from Humboldt and Von
Buch.