Notes the occurrence in U. S. of "vermiform piles" produced by earthworms.
Botanic Garden, | Cambridge, Mass.
Feb. 2. 1872
My Dear Darwin
Your note of the 15
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 & Dionæa
My wife joins in kindest regards to you and yours | Ever Yours sincerely | Asa Gray