1842-1843: AGE 35-36.
Zoological Work uninterrupted by Glacial Researches.--Various
Publications.--"Nomenclator Zoologicus."--"Bibliographia Zoologiae
et Geologiae."--Correspondence with English Naturalists.
--Correspondence with Humboldt.--Glacial Campaign of 1842.
--Correspondence with Prince de Canino concerning Journey to United
States.--Fossil Fishes from the Old Red Sandstone.--Glacial
Campaign of 1843.--Death of Leuthold, the Guide.