From Asa Gray 2 February 1872
Botanic Garden | Cambridge, Mass.
Feb. 2. 1872
My Dear Darwin
Your note of the 15th ult. just in.1
I have read it to two good observers,—who say the “vermiform piles” are common enough here,—and I should think, if not as common as with you thro’ the season, it was owing to interruption in the dry part of our hot summer.
I know nobody now at hand here who could give a comparison with your country. Perhaps I may find some one in Canada to ask.
Now, pray don’t run off on some other track till you have worked out and published about Drosera & Dionæa2
My wife3 joins in kindest regards to you and yours | Ever Yours sincerely | Asa Gray
Notes the occurrence in U. S. of "vermiform piles" produced by earthworms.
Please cite as
Darwin Correspondence Project, “Letter no. 8194,” accessed on 8 December 2016, http://www.darwinproject.ac.uk/DCP-LETT-8194