8 



have received considerable assistance from Mr Francis Darwin, to whom we 

 offer our cordial thanks. The portraits reproduced as the Frontispiece and as 

 Plates II, IV, VI, and X are reproduced from plates originally published in 

 More Letters of Charles Darwin. For the use of these we are indebted to 

 Mr Francis Darwin, and to the courtesy of Mr John Murray. For the loan of 

 Plate V our thanks are due to Mr John Murray, by whom the illustration was 

 first published in an edition of the Journal of Researches in 1890. Plate III 

 is from a photograph taken by permission of the Master of Christ's College 

 by Messrs Scott and Wilkinson of Cambridge. Plate I is reproduced from 

 a photograph in the possession of Sir George Darwin, and Plates VII, 

 VIII, IX are from originals supplied by Mr Francis Darwin. 



J. W. CLARK \ Honorary Secretaries, 



A. C. SEWARD J Darivin Celebration Committee. 



Cambridge, 

 June, 1909. 



