24 THE DARWINIAN THEORY 



Darwin and Wallace, who, working perfectly inde- 

 pendently, set themselves deliberately to attack the 

 problem on the lines laid down by Lyell — viz., by 

 prolonged and detailed study of the conditions under 

 which animal life exists at the present day. After 

 years of patient work they were led independently 

 to identical conclusions, which were announced 

 simultaneously from opposite sides of the globe. 



