Henry David Thoreau
Blue Jays by Audubon
The Correspondence of Henry D. Thoreau
Volume 1: 1834 - 1848
The Adventures of Henry Thoreau
A Young Man's Unlikely Path to Walden Pond
The Maine Woods
Transcendentalism: Essential Essays of Emerson & Thoreau
Henry David Thoreau and Nineteenth-Century Science
"An Insect View of Its Plain"
Insects, Nature and God in Thoreau, Dickinson and Muir
I observe that in the cut by Walden Pond the sand and stones fall from the overhanging bank and rest on the snow below; and thus, perchance, the stratum deposited by the side of the road in the winter can permanently be distinguished from the summer one by some faint seam, to be referred to the peculiar conditions under which it was deposited.
The blue jays evidently notify each other of the presence of an intruder, and will sometimes make a great chattering about it, and so communicate the alarm to other birds and to beasts.
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