FROM A NOTE-BOOK OF 1837. 



led to comprehend true affinities. My theory would give 

 zest to recent & Fossil Comparative Anatomy : it would lead 

 to study of instincts, heredity, & mind heredity, whole meta- 

 physics, it would lead to closest examination of hybridity & 

 generation, causes of change in order to know what we have 

 come from & to what we tend, to what circumstances favour 

 crossing & what prevents it, this & direct examination of 

 direct passages of structure in species, might lead to laws of 

 change, which would then be main object of study, to guide 

 our speculations. 



