As you say, I have been thoroughly well attacked and reviled (especially by entomologists--Westwood, Wollaston, and A.Murray have all reviewed and sneered at me to their hearts' content), but I care nothing about their attacks; several really good judges go a long way with me, and I observe that all those who go some little way tend to go somewhat further.

What a fine philosophical mind your friend Mr.
Wallace has, and he has acted, in relation to me, like a true man with a noble spirit.

I see by your letter that you have grappled with several of the most difficult problems, as it seems to me, in Natural History--such as the distinctions between the different kinds of varieties, representative species, etc.

Perhaps I shall find some facts in your paper on intermediate varieties in intermediate regions, on which subject I have found remarkably little information.

I cannot tell you how glad I am to hear that you have attended to the curious point of equatorial refrigeration.