“I accept extinction as best explaining disjoined species. I see that the same cause must have reduced many species of great range to small, and that it may have reduced large genera to so small, and of families.” MayCausesAcceptingSpeciesRangeExtinctionExplaining Author:Asa Gray
“Your candor is worth everything to your cause. It is refreshing to find a person with a new theory who frankly confesses that he finds difficulties, insurmountable, at least for the present.” PersonsCausesTheoryDifficultyRefreshingCandorInsurmountable Book:Letters of Asa Gray Source: Letters of Asa Gray
