Columbia subject headings:
Authors, American--19th century--Biography.
Natural history--Massachusetts--Walden Woods.
Solitude.
Thoreau, Henry David, 1817-1862--Homes and haunts--Massachusetts--Walden Woods.
Walden Woods (Mass.)--Social life and customs.
Wilderness areas--Massachusetts--Walden Woods.
Harvard subject headings:
Authors, American--19th century--Biography
Natural history--Massachusetts--Walden Woods
Solitude
Thoreau, Henry David, 1817-1862--Homes and haunts--Massachusetts--Walden Woods.
Walden Woods (Mass.)--Social life and customs.
Wilderness areas--Massachusetts--Walden Woods
Princeton subject headings:
Authors, American--19th century--Biography.
Natural history--Massachusetts--Walden Woods.
Solitude.
Thoreau, Henry David, 1817-1862--Homes and haunts--Massachusetts--Walden Woods.
Walden Woods (Mass.)--Social life and customs.
Wilderness areas--Massachusetts--Walden Woods.