Thoreau surveys land near Walden Pond for Rufus Warren (A Catalog of Thoreau’s Surveys in the Concord Free Public Library, 12).
Thoreau also writes in his journal:
Carex debilis, not long.
Along the edge of Warren’s wood east of the Cut, see not only the chestnut-sided warbler but the splendid Sylvia pardalina. It is a bright yellow beneath, with a broad black stripe along each side of the throat . . .
