Darwin-Hooker Letters : Letter from C. R. Darwin to J. D. Hooker 18 November [1856]
Darwin, Charles Robert
Darwin-Hooker Letters
<p style='text-align: justify;'>CD encloses letter from Asa Gray, although it is critical of JDH.</p><p style='text-align: justify;'>Role of struggle in forming species in retreat from advancing glaciers.</p>