Thoreau writes in his journal:
Sophia has sent me, in a letter from Worcester, part of an orchid in bloom, apparently Platanthera Hookeri (?), or smaller round-leafed orchis, from the Hermitage Wood, so called, northeast of the town . . .
Thoreau also sends copies of A Week on the Concord and Merrimack River and Walden to California for Calvin Greene (The Correspondence of Henry David Thoreau, 426).