JH. XI.] TWO OBJECTIONS CONSIDERED. 49 



thinkers. But enough has already been explained to draw 

 forth the undeniable Fact of Derivation from the region of 

 mystery in which it was formerly half-hidden, and thus to 

 place the Theory of Derivation upon a thoroughly scientific 

 basis. In expounding the way in which this has been done, 

 we have obtained several useful conceptions, which will not 

 fail to do us good service in future chaptera^ 



TOL, 



