4 Pages in Charles Darwin's Library associated with "geology - clay, London"

A history of British fossil mammals and birds.
By: Owen, Richard,
Publication info: London :John Van Voorst,1846.
Pages: Page xx Page xxi Page 542
Principles of geology.
By: Lyell, Charles.
Publication info: London :John Murray,1837.
Volume: v.4
Pages: Page 214