Thoreau writes in his journal:
Carried to [Thaddeus W.] Harris the worms—brown, light-striped—and fuzzy black caterpillars (he calls the first also caterpillars); also two black beetles; all which I have found within a week or two on ice and snow; thickest in a thaw. Showed one, in a German work, plates of the larvæ of dragon-flies and ephemeræ . . .
Thoreau also checks out The History of English Birds by Thomas Bewick and Histoire du Canada by Gabriel Sagard from Harvard College Library (Companion to Thoreau’s Correspondence, 291).
