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Darwin Correspondence Project

Species theory outlined

MS-DAR-00006-000-00003.jpg

Cover sheet of Darwin's 1842 Pencil Sketch, in which he first uses the term 'Natural Selection'
http://cudl.lib.cam.ac.uk/view/MS-DAR-00006/5
Cover sheet of Darwin's 1842 Pencil Sketch, in which he first uses the term 'Natural Selection'
CUL DAR 6: 1
Cambridge University Library

Darwin writes a 32-page outline of his ideas on species change, known as 'the pencil sketch' 

May 1842
1842-05-15