Darwin-Hooker Letters : Letter from J. D. Hooker to C. R. Darwin 22 November 1856
Hooker, Joseph Dalton
Darwin-Hooker Letters
<p style='text-align: justify;'>Continued debate on formation of species as a result of retreat from glaciers.</p><p style='text-align: justify;'>JDH suggests internal powers of species modification, which he knows CD abhors.</p>