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To Oswald Heer?   20 April [1861?]

Summary

Thanks for correspondent’s Untersuchungen [? Über das Klima und die Vegetationsverhältnisse des Tertiärlandes (1860)]. CD has always considered subject interesting and important.

Author:  Charles Robert Darwin
Addressee:  Oswald Heer
Date:  20 Apr [1861?]
Classmark:  Catherine Barnes (dealer) (2002)
Letter no:  DCP-LETT-2765

To Frederick Wollaston Hutton   20 April 1861

Summary

Comments on FWH’s article ["Some remarks on Mr Darwin’s theory", Geologist (1861): 132–6, 183–8]. Does not adduce direct evidence of species change but believes it because so many phenomena thus explained.

Author:  Charles Robert Darwin
Addressee:  Frederick Wollaston Hutton
Date:  20 Apr 1861
Classmark:  DAR 145
Letter no:  DCP-LETT-3122