Concord, Mass. Thoreau writes in his journal:

Cambridge, Mass. Thoreau checks out The substance of a journal during a residence at the Red River colony, British North America by John West, A Treatise on the esculent funguses of England by Charles David Badham, A History of British ferns by Edward Newman, and Histoire véritable et naturelle des moeurs et productions dú pays de la Nouvelle France, vulgairement dite la Canada by Pierre Boucher (Companion to Thoreau’s Correspondence, 292).