CONTENTS. 



PAGE 



V. SECOND JOURNEY IN EUROPE. CORRESPONDENCE. 



1850-1859 369 



VI. LETTERS TO DARWIN AND OTHERS. 1860-1868 . 454 



VII. TRAVEL IN EUROPE AND AMERICA. 1868-1880 . . 565 



VIII. FINAL JOURNEYS AND WORK. 1880-1888 , 701 



NOTE ON THE ILLUSTRATIONS. The frontispiece portrait of Dr. 

 Gray is a photogravure from a photograph taken in 1880. The plate 

 of Dr. Gray in his study, facing page 529, is from a photograph 

 taken in 1879. The view of the present Range of Buildings in the 

 Botanic Garden, facing page 614, is from a photograph taken for 

 this work. 



