370 THE WONDER OF LIFE 



the like will not indeed make occurrences any clearer, 

 but it may serve as a useful labelled string for a large series 

 of facts the linking of one organism to another, at points 

 where their lines of life intersect, although we often cannot 

 see any obvious reason why they should do so. After 

 the event, we say, * It pays ' ; but who could have pre- 

 dicted its success. In any case, the correlation of organ- 

 isms in the web of life is a large fact. Nature continues 

 to complexify her system. 



