220 FOOT-NOTES TO EVOLUTION. 



and meaningless. We know no facts which lie beyond 

 the realm of law. I may close with the language of 

 Asa Gray : 



" When we gather into one line the several threads 

 of evidence of this sort to which we have here barely 

 alluded we find that they lead in the same direction 

 with the views furnished by [other lines of investigation]. 

 Slender indeed each thread may be, but they are mani- 

 fold, and together they bind us firmly to the doctrine of 

 the derivation of the species." 



