330 NATURAL HISTORY OF 



natural directions of progress from one region to ano- 

 ther, however distant ; and that local conditions impel 

 all migrators, once moving on a given line, to follow it 

 out to the ultimate destination. These observations 

 apply entirely in the human movements, from east to 

 west; mountain chains, deserts, the course of rivers, 

 and even real obstacles, conspire to produce the same 

 results, while the contrary direction is all but imprac- 

 ticable. Intellectual power alone, where arms have 

 ever failed, brings it back to the east by the progress 

 of religious truth, of science, and of the reasoning of 

 common sense : thus amply repaying Asia for the 

 innumerable rudiments of practical and imaginative 

 life we have owed her for so many ages. 



Having disposed of the Finnic Stem, and shown, in 

 the mixture of the Hyperborean with the Caucasian 

 stocks, the direct consequence of soon obliterating the 

 external appearance of hybridism, and perhaps, with 

 somewhat less precreative fertility, tending to elevate 

 individuals and whole clans to giant forms, we should 

 now proceed with the true Caucasian or bearded type, 

 if it were not, that at the commencement of the division 

 cf the primeval stocks, we had noticed, on the South of 

 the Caucasian, that there was similarly an intermediate 

 stem formed of the woolly haired or Negro type, in 

 various states of commixture with the bearded, where 

 the tokens of degradation, or of inferiority, passed 

 away with even greater rapidity, but less durable 

 results; and though the stature remained the same, 

 the marked difference of colour proved the descent 



