PREFACE 



WRITING these reminiscences of his life's work 

 was one of the pleasures of Dr. Williamson's later 

 years. I have thought it better to give them to his 

 readers without alteration, and have done nothing 

 more than put his disconnected sketches into some- 

 thing like order, add a few footnotes, and the last 

 pages. 



For kind supervision of the chapter on Palseo- 

 botany I am indebted to Dr. D. H. Scott. 



I have compiled the list of writings from the 

 " Catalogue of Scientific Works " published by the 

 Royal Society (a proof of the last edition of which 

 now in the press was kindly sent me by the 

 Secretary), and from works in my own possession. 



A. C. W. 



43 ELMS ROAD, 



CLAPHAM COMMON, S.W. 



