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.

CHAPTER 9.

1837-1839: AGE 30-32.

Invitation to Professorships at Geneva and Lausanne.--Death of his
Father.--Establishment of Lithographic Press at Neuchatel.
--Researches upon Structure of Mollusks.--Internal Casts of Shells.
--Glacial Explorations.--Views of Buckland.--Relations with Arnold
Guyot.--Their Work together in the Alps.--Letter to Sir Philip
Egerton concerning Glacial Work.--Summer of 1839.--Publication of
"Etudes sur les Glaciers."

CHAPTER 10.

1840-1842: AGE 33-35.

Summer Station on the Glacier of the Aar.--Hotel des Neuchatelois.
--Members of the Party.--Work on the Glacier.--Ascent of the