Bibliography - The Correspondence of Charles Darwin
Find Primary Sources - European History - Clark Family Library at Washington & Jefferson College
What Darwin Read Darwin Correspondence Project
Darwin, Francis ed. 1887. The life and letters of Charles Darwin, including an autobiographical chapter. vol. 3. London: John Murray.
Charles Darwin Letters - UBC Library Open Collections
Charles Darwin, Autograph letter signed from Darwin to Lyell, autograph letter from W.J. Hooker to Darwin, plus ephemera, Travel, Atlases, Maps, Photographs & Natural History, 2023
Churchill Archive for Schools - Guide to Primary Sources_Letters
Darwin's letters go online
letters Bodleian History Faculty Library at Oxford
Darwin Correspondence Project
Darwin's species notebooks: 'I think . . .
Darwin on the Web: Resources for Darwin 200 and Beyond
Letters in the Limelight: Alfred Russel Wallace (1823-1913)
Darwin Correspondence Project