I can see plainly, by your new illustrations and manner and order of putting the case, that you thoroughly comprehend the subject.

I assure you this is most gratifying to me, and it is the sole way in which the public can be indoctrinated.

I am often in despair in making the generality of NATURALISTS even comprehend me.

Intelligent men who are not naturalists and have not a bigoted idea of the term species, show more clearness of mind.

I think that you have done the subject a real service, and I sincerely thank you.