CHAPTER 11.. 1842-1843: Age 35-36.

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.